Perhaps you should try some spelling variations:
"computers applied. in life science" » "computing applied. in life science", "computers applied. in life sciences", "computers applied. in fire science", "computers appied. in life science", "computers appsied. in life science"
"computer example. in file science" » "computer examples. in file science", "computed example. in file science", "computed examples. in file science", "computer example. in files science", "computer example. in fire science", "computer example. in five science"
"computer appl. in life science" » "computer appl. in life sciences", "computer appl. in fire science", "computer app. in life science", "computer apps. in life science"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("computers applied. in life science") OR ("computer appl. in life science"))) OR ("computer example. in file science")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"computers applied. in life science\") OR (\"computer appl. in life science\"))) or (\"computer example. in file science\"))".
• Removing quotes may allow a broader search: (((( computers applied. in life science ) OR ( computer appl. in life science ))) or ( computer example. in file science )).
• Adding a wildcard symbol may retrieve word variants: (((("computers applied. in life science") OR ("computer appl. in life science"))) or ("computer example. in file science"))*.