Create Multiple Mini-Search Box In Magneto

step 1: GOTO :> app\design\frontend\[theme]\default\layout\catalogsearch.xml
step 2: ->Find This Code.

<reference name="header">
<block type="core/template" name="top.search" as="topSearch" template="catalogsearch/form.mini.phtml"/>
</reference>

  ->Replace This Code.

<reference name="header">
<block type="core/template" name="top.search" as="topSearch" template="catalogsearch/form.mini.phtml"/>
<block type="core/template" name="Second_Search" as="Second_Search" template="catalogsearch/Second_form.mini.phtml"/>
<block type="core/template" name="third_Search" as="third_Search" template="catalogsearch/third_form.mini.phtml"/>
</reference>

 
step 3: GOTO :> app\design\frontend\rwd\default\template\catalogsearch\form.mini.phtml ->Find This Code.

<form id="search_mini_form" action="<?php echo $catalogSearchHelper->getResultUrl() ?>" method="get">
<div class="input-box">
<label for="search"><?php echo $this->__('Search:') ?></label>
<input id="search" type="search" name="<?php echo $catalogSearchHelper->getQueryParamName() ?>" value="<?php echo $catalogSearchHelper->getEscapedQueryText() ?>" class="input-text required-entry" maxlength="<?php echo $catalogSearchHelper->getMaxQueryLength();?>" placeholder="<?php echo $this->__('Search entire store here...') ?>" />
<button type="submit" title="<?php echo $this->__('Search') ?>" class="button search-button"><span><span><?php echo $this->__('Search') ?></span></span></button>
</div>

<div id="search_autocomplete" class="search-autocomplete"></div>
<script type="text/javascript">
//<![CDATA[
var searchForm = new Varien.searchForm('search_mini_form', 'search', '');
searchForm.initAutocomplete('<?php echo $catalogSearchHelper->getSuggestUrl() ?>', 'search_autocomplete');
//]]>
</script>
</form>

  ->Replace This Code. Second Search:> ->Replace This Code.  

<form id="Second_search_mini_form" action="<?php echo $catalogSearchHelper->getResultUrl() ?>" method="get">
<div class="input-box">
<label for="Second_search"><?php echo $this->__('Search:') ?></label>
<input id="Second_search" type="search" name="<?php echo $catalogSearchHelper->getQueryParamName() ?>" value="<?php echo $catalogSearchHelper->getEscapedQueryText() ?>" class="input-text required-entry" maxlength="<?php echo $catalogSearchHelper->getMaxQueryLength();?>" placeholder="<?php echo $this->__('Search entire store here...') ?>" />
<button type="submit" title="<?php echo $this->__('Search') ?>" class="button search-button"><span><span><?php echo $this->__('Search') ?></span></span></button>
</div>

<div id="Second_search_autocomplete" class="search-autocomplete"></div>
<script type="text/javascript">
//<![CDATA[
var searchForm = new Varien.searchForm('Second_search_mini_form', 'Second_search', '');
searchForm.initAutocomplete('<?php echo $catalogSearchHelper->getSuggestUrl() ?>', 'Second_search_autocomplete');
//]]>
</script>
</form>

  Third Search:>

<form id="Second_search_mini_form" action="<?php echo $catalogSearchHelper->getResultUrl() ?>" method="get">
<div class="input-box">
<label for="Second_search"><?php echo $this->__('Search:') ?></label>
<input id="Second_search" type="search" name="<?php echo $catalogSearchHelper->getQueryParamName() ?>" value="<?php echo $catalogSearchHelper->getEscapedQueryText() ?>" class="input-text required-entry" maxlength="<?php echo $catalogSearchHelper->getMaxQueryLength();?>" placeholder="<?php echo $this->__('Search entire store here...') ?>" />
<button type="submit" title="<?php echo $this->__('Search') ?>" class="button search-button"><span><span><?php echo $this->__('Search') ?></span></span></button>
</div>

<div id="Second_search_autocomplete" class="search-autocomplete"></div>
<script type="text/javascript">
//<![CDATA[
var searchForm = new Varien.searchForm('Second_search_mini_form', 'Second_search', '');
searchForm.initAutocomplete('<?php echo $catalogSearchHelper->getSuggestUrl() ?>', 'Second_search_autocomplete');
//]]>
</script>
</form>

  step 4: You Can Use Any .phtml File :>

<?php echo $this->getChildHtml('topSearch') ?>
<?php echo $this->getChildHtml('Second_Search') ?>
<?php echo $this->getChildHtml('third_Search') ?>