There are several ways: 1, with double quotation marks, 2, and plus sign. For example, entering "+computer+phone+fax" in a search engine means that the search content must include three keywords: "computer, phone and fax".

3. Use a minus sign before the keyword to indicate that the keyword cannot appear in the query results. For example, entering "TV Station-Shenzhen TV Station" in the search engine means that the query results must not contain "TV Station".

Step 4 be case-sensitive