Perhaps you should try some spelling variations:
"computers applied. in fire science" » "computing applied. in fire science", "computer appl. in fire science", "computers applied. in file science", "computers applied. in five science", "computers applied. in firm science"
"computers applied. in first science" » "computing applied. in first science", "computer appl. in first science", "computers applied. in forest science", "computers applied. in first scene", "computers applied. in first evidence"
"computer apple. in life science" » "computer appl. in life science", "computer example. in life science", "computer simple. in life science", "computer apple. in life sciences"
"computer apple. in fire science" » "computer appl. in fire science", "computer example. in fire science", "computer simple. in fire science", "computer apple. in file science", "computer apple. in five science", "computer apple. in firm science"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("computer apple. in life science") OR ((("computer apple. in fire science") OR ((("computers applied. in fire science") OR ("computers applied. in first science")))))).
• Removing quotes may allow a broader search: (( computer apple. in life science ) or ((( computer apple. in fire science ) or ((( computers applied. in fire science ) or ( computers applied. in first science )))))).
• Adding a wildcard symbol may retrieve word variants: (("computer apple. in life science") or ((("computer apple. in fire science") or ((("computers applied. in fire science") or ("computers applied. in first science"))))))*.