Perhaps you should try some spelling variations:
operation instrumentation » applications instrumentation, therapy instrumentation, modern instrumentation
instrumentation theory » instrumentation methods, instrumentation https, instruction theory
theory decision » theory design
basics linear » based linear, basics clear
bases linear » based linear, games linear, mass linear
basic linear » quasi linear, basic life

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