The document discusses advanced online search strategies including Boolean expressions, phrase searching, wildcards, truncation symbols, proximity operators, nested searches, and limiters or fields. It explains how Boolean operators like AND, OR, and NOT can narrow or broaden searches. Phrase searching uses quotation marks. Wildcards and truncation symbols can find variations of search terms. Proximity operators specify the distance between terms. Nested searches allow combining search criteria. Limiters filter results by fields like date or type.