cavermark said:
Do all search engines rely on you using exactly the right word as Cookie points out (ie. chambers rather than chamber) ?
When you're using Google as a stand alone search engine, it will pick up different forms of the word, eg chamber as well as chambers, and also attempts to correct (real and perceived) spelling errors. But it looks as if this facility is turned off if you limit your search to a particular site.
For example, going to Google and searching for
chamber 3d site:.ukcaving.com
chambers 3d site:.ukcaving.com
give different results, and give exactly the same results in each case as if you searched from inside ukcaving for chamber 3d or chambers 3d.
If on the other hand you search for
chamber 3d ukcaving
you get results for both chamber and chambers (and, of course, a whole lot of other results that aren't on ukcaving)