There are many great features that will help you find what you're after with search.
|+||+rocket||By placing a "+" sign in front of what you're wishing to search for means that you must have that word in the search results.|
|-||-moon||By placing a "-" sign in front of what you're wishing to search for means that you must NOT have that word in the search results.|
|Multi-word||rocket moon||Returns all websites with the words rocket OR moon in them.|
|*||rock*||Would return all websites containing any word beginning with "rock".|
|"||"moon rocket"||Returns all websites that contain the phrase "moon rocket".|
|~||~moon||Negative contribution to the search, but not completely negate the keyword like the "-" sign.|
You can combine the above advanced search functionality to help you find what you are looking for. For example, "+rocket -moon" would find all websites that contain the word rocket but NOT the word moon. You could also do "+rocket -moon +'Neil Armstrong'" to find all websites with the word rocket but not moon but also the phrase Neil Armstrong.