Just like you would with a Google search, use the double quotes operator to tell Preview the result must be an exact match.
In your case, for example, typing "formation water" should yield the desired result.
How to search a phrase in Preview of OS X?
Just like you would with a Google search, use the double quotes operator to tell Preview the result must be an exact match.
In your case, for example, typing "formation water" should yield the desired result.