Google search allows you to use specific terms to narrow your query:

• Place a + before a word to have it included, e.g. +Apollo to locate pages that contain Apollo in them.
• Place a - before a word to exlude pages containing that word: -Apollo
• Place quotes around phrases to find pages containing the phrase: "landed on the moon"
• Terms can be combined: +Apollo "landed on the moon" or -Apollo "landed on the moon"