When you have found suitable search terms it is time to combine them into a search string.
The simplest way to do this is to write the words one after the other. By modifying the search string you get a better result.
To modify the search string you can use
By using quotation marks (phrase search) you can search with the combination of two or more words. The words written inside the quotation marks will appear in that order in the search results. There are differences in phrase searches between databases, which you can check in the database quick guide.
When searching without quotation marks, the words are searched individually in the database. Therefore, the search words may occur far away from each other, so the search results may include unusable material.
Boolean operators OR, AND and NOT are usually used to combine search terms and strings. In many databases you can also use proximity operators. Search terms with their truncation symbols and the operators that combine them form a search string, and this is expressed differently depending on the database. In addition to the used operators, combining search terms and strings is affected by the search order and the use of brackets. It is wise to check the operators and their functions in the guides.