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
basic linear » quasi linear, basic life
class linear » less linear, mass linear, class library

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 ((((basics linear) OR (basic linear))) or (class linear))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: operation instrumentation theory decision ((((basics linear) OR (basic linear))) OR (class linear)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "operation instrumentation theory decision ((((basics linear) OR (basic linear))) or (class linear))".
• Adding a wildcard symbol may retrieve word variants: operation instrumentation theory decision ((((basics linear) OR (basic linear))) or (class linear))*.