You can precede a "-" to a search term, then the pages that include this term are suppressed.

Results with exact matches get a higher rank than results with partial matches. E.g. you are looking for "easy", found terms are "easy", "i-easy" and "i-easy-kit". In this case the search results will be shown in exactly this order, because "easy" is shorter than "i-easy" and "i-easy" is shorter than "i-easy-kit".

If several hits occur in one page than this page gets a higher rank than a side with lesser hits. But exact matches count more than partial matches.