Perhaps you should try some spelling variations:
"graphical processing unit." » "graphics processing unit.", "graphical processing units.", "graphical processing nlp."
"graphical processing a." » "graphics processing a.", "graphical processing nlp.", "graphical pressing _.", "graphical processing based."
"graphical processing _." » "graphics processing _."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("graphical processing unit.") or ((("graphical processing a.") or ("graphical processing _."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("graphical processing unit.") OR ((("graphical processing a.") OR ("graphical processing _.")))).
• Removing quotes may allow a broader search: (( graphical processing unit. ) or ((( graphical processing a. ) or ( graphical processing _. )))).
• Adding a wildcard symbol may retrieve word variants: (("graphical processing unit.") or ((("graphical processing a.") or ("graphical processing _."))))*.