Well, something that combines all useful hints and more...
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Did you know?
You can get up to 200 results per page by adding numimgs:results to your search.
Example: nanoha panties numimgs:50

You can exclusively search for results from a site by adding site:site to your search.
Example: falce site:sankakucomplex

You can remove results from a site by adding -site:site to your search.
Example: mittens -site:danbooru

You can search based on rating by adding rating:rating to your search.
Example: haruhi rating:safe

You can filter results on image size by adding size:size to your search.
Example: claymore size:large

You can negate search terms by adding -term to your search.
Example: school -uniform

You can search with OR queries by adding ~term to your search.
Example: toradora ~mittens

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Think this (or something alike) should be included somewhere.
Plus, are there more terms? Maybe "score"?