Is it better to enter general search terms like "screws" or specific ones like "concrete screws?" 

If you already know exactly which product or service you need, you can directly start your search with a specific term such as "concrete screws." If you just want an overview of the different types of screws, it is best to start with a generic term.   
 Our tip: Use placeholders to get more matches. Just put an asterisk before, after, or in the middle of a term without any spaces. For "bolts*," the results page shows results from "anchor bolts" to "cylinder head bolts."