SEARCH GENERALIZATION
Too few hits?
Boolean query: remove the keywords with AND operator, or delete the NOT item.
Use the directory or metasearch engine if still cannot locate the matched URL.
SEARCH SPECIALIZATION
Too many hits?
Pattern matching query: add more keywords.
Boolean query: use AND with other, or add NOT operator to excluded some unwanted pages.
Try capitalizing proper nouns or names.
Use a directory to locate your information.