@denisjoel
You can simply replace the WordPress search form code in your theme template with the following (it will give you the standard BP search form for Members, Groups, Blogs, Forums, Posts). Plus, the “Search anything…” default text will disappear when the user clicks in it.
`<form action="” method=”post” id=”search-form”>
<input type="text" id="search-terms" name="search-terms" value="” onfocus=”if (this.value == ” ) { this.value = ”; }” onblur=”if (this.value == ”) { this.value = ”;}” /> in
<input type="submit" name="search-submit" id="search-submit" value="” />
`