I want this word and that word but not another word. Commercial databases commonly expand Boolean to include bracketts and sets. An advance on a basic search involves demanding your search words appear close to each other. This is a particularly powerful technique for large documents. Proximity Indicators are highly specific in the commercial world but on the net, we only have quotes and with Altavista, a couple further options.
Place quotes around words to insist words appear together in that position.
Altavista offers two further options. Where available, proximity is best way to remove the dross without affecting the value of information. Searching We can separately search the Title, URL, and Index date on many search engines. These are fields. Field searching is a common way to refine a search.