Perhaps you should try some spelling variations:
ionization instrumentation » operation instrumentation, radiation instrumentation, collection instrumentation
instrumentation generic » instrumentation genetic, instrumentation general, instrumentation energy
generic functions » energy functions, gene functions, generating functions
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: ionization instrumentation generic functions ((image spaces) or ((gate or gale) stacks))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ionization instrumentation generic functions ((image spaces) OR ((gate OR gale) stacks)).
• Adding a wildcard symbol may retrieve word variants: ionization instrumentation generic functions ((image spaces) or ((gate or gale) stacks))*.