It was supposed to search for a variety of filetypes with web design-related tags. It was being really spotty until I manually set FinderFilesOnly to false in the PLIST.

WebDev.savedSearch.xml

<key>RawQueryDict</key>
<dict>
	<key>FinderFilesOnly</key>
	<false/>
	<key>RawQuery</key>
	<string>(true) &amp;&amp; (((InRange(kMDItemContentCreationDate,$time.today(-1Y),$time.today(+1d)) &amp;&amp; ((kMDItemOMUserTags = "*jquery*"cd) || (kMDItemOMUserTags = "*javascript*"cd) || (kMDItemOMUserTags = "*responsive*"cd) || (kMDItemOMUserTags = "*webdesign*"cd) || (kMDItemOMUserTags = "*webdev*"cd) || (kMDItemOMUserTags = "html5*"cdw) || (kMDItemOMUserTags = "*css3*"cd) || (kMDItemKeywords = "*jquery*"cd) || (kMDItemKeywords = "*javascript*"cd) || (kMDItemKeywords = "*responsive*"cd) || (kMDItemKeywords = "*webdesign*"cd) || (kMDItemKeywords = "*webdev*"cd) || (kMDItemKeywords = "*html5*"cd) || (kMDItemKeywords = "*css3*"cd)) &amp;&amp; (((kMDItemKind = "Web*"cdw) &amp;&amp; ((kMDItemKind = "Internet*"cdw) &amp;&amp; (kMDItemKind = "Location*"cdw))) || (kMDItemKind = "Markdown*"cdw) || ((kMDItemKind = "Delish*"cdw) &amp;&amp; (kMDItemKind = "Bookmark*"cdw)) || (_kMDItemGroupId = 11)))))</string>
	<key>SearchScopes</key>
	<array>
		<string>kMDQueryScopeComputer</string>
	</array>
	<key>UserFilesOnly</key>
	<true/>
</dict>

A more visual version of the above query: