Perhaps you should try some spelling variations:
operation instrumentation » applications instrumentation, therapy instrumentation, modern instrumentation
instrumentation theory » instrumentation methods, instrumentation https, instruction theory
theory revision » theory decision, theory revisited, theory session
basics linear » basic linear, based linear, basics clear
basis linear » basic linear, bases linear, based linear

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 theory revision ((((basis linear) or (basics linear))) or (less linear))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: operation instrumentation theory revision ((((basis linear) OR (basics linear))) OR (less linear)).
• Adding a wildcard symbol may retrieve word variants: operation instrumentation theory revision ((((basis linear) or (basics linear))) or (less linear))*.