- the "-" operator excludes all results that include this search term, as in [biomedicine -magnetic]
- phrase search only returns results that include this exact phrase, as in ["as you like it"]
- the "~" operator will find synonyms for that word, as in [~robotics]
- the "OR" operator returns results that include either of your search terms, as in [soccer OR football]
- the "intitle:" operator as in [intitle:mars] only returns results that include your search term in the document's title
- the "author" operator [author:flowers] returns papers written by people with the name Flowers, whereas [flowers -author:flowers] returns papers about flowers, and ignores papers written by people with the name Flowers
- using quotes around a common word makes sure your results include common words, letters or numbers that Google's search technology generally ignores, as in ["the" border]