Perhaps you should try some spelling variations:
instrumentation generating » instrumentation general, instrumentation genetic, instrumentation interfacing
operation instrumentation » applications instrumentation, therapy instrumentation, modern instrumentation
image spaces » image space, image stacks, image states
gate » gave, game, gae

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

• Performing a fuzzy search may retrieve terms with similar spellings: operation instrumentation generating functions ((image spaces) or ((gate OR gale) stacks))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: operation instrumentation generating functions ((image spaces) OR ((gate OR gale) stacks)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "operation instrumentation generating functions ((image spaces) or ((gate OR gale) stacks))".
• Adding a wildcard symbol may retrieve word variants: operation instrumentation generating functions ((image spaces) or ((gate OR gale) stacks))*.