אולי כדאי לנסות איות אחר או כתיב מלא:
operation instruction » operation instructions, operation construction, operating instructions
instruction theory » introduction theory, institutional theory
theory revision » theory decision, theory revisited, theory session
basis linear » basics linear, bases linear, based linear
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 instruction theory revision ((((basis linear) or (basic linear))) or (class linear))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: operation instruction theory revision ((((basis linear) OR (basic linear))) OR (class linear)).
• Adding a wildcard symbol may retrieve word variants: operation instruction theory revision ((((basis linear) or (basic linear))) or (class linear))*.