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You can enter multiple words separated by commas: peanuts, government, prudent. The comma in the query string is treated like an "OR", that is, items separated by commas are translated by the search engine to search for documents that contain "peanuts" or "government" or "prudent". If you omit the commas, the query expression is treated as a phrase, so documents are searched for the phrase "peanuts government prudent".