Writing a complex search statement comes in handy when you want to include all of your concepts, and synonyms. This involves using some other symbols like the ones below:
(...) - Parenthesis create groups of words and are usually used when combining synonyms with OR
"...." - Quotation marks can be used when you want to find a common phrase. For instance, the word time may not be helpful unless it is part of the phrase "recovery time"
("Physical therapy" OR Exercise) AND "Rotator Cuff" AND Injury AND "Recovery time"
("Physical therapy" OR Exercise) AND "Rotator Cuff" AND (Injury OR trauma) AND "Recovery time"
Sometimes if you can't think of other words, a subject heading can help.