The SL search is very inefficient. google's site: http://senseis.xmp.net/ tends to be better... At the very least, when I use a particular phrase or collection of keywords, then always should SL list a page with 100% matching at place 1. It does not. E.g., searching for "Ko Types" lists KoTypes only as entry 31!
I suggest all follow-ups go to topic:5280 in bug reports.
P.S. The search is not inefficient, but ineffective. It is very fast, but it doesn't return the desired documents near the top of the results list.