Keywords may be separated by logical operators AND and OR.
For example, you may enter oil AND shampoo. That search will post you the products of which description contains simultaneously both words. However, if you type oil OR shampoo, all the products of which description contains at least one of the two words will be listed. If no logical operator is used, the search will use the AND operator.
Exact matches can be searched for by enclosing keywords in double-quotes. For example, searching for "virgin oil" will post a list of all the products containing that exact string in their description. If you use spaces around the word like " name " you will eliminate the occurrences like names ou naming.
Brackets can be used for further control on the result set. For example, oil AND (gel OR shampoo OR "sea salt").