The search engine is not case-sensitive. For example, injury claim will get the same results as Injury Claim.
Look for two or more words at once by typing AND between the words. This means only pages that contain both of the words will show up in the results. For example, type injury AND claim to only see pages that include both injury and claim.
Look for synonyms or similar words by typing OR between words. Note that if you don't use OR and search for multiple words, the words are treated as a phrase. For example, type hazardous OR chemicals to find results containing hazardous or chemicals, but not necessarily both.
You can limit your search by typing AND NOT to exclude words. For example, type repetitive AND NOT stress injury to find all instances of repetitive, as long as repetitive is not followed by the phrase stress injury.