Perhaps you should try some spelling variations:
observational clinical » observation clinical, observations clinical, observational limits
observational context » observational concepts, observational contacts, observation content
observational cinema » observational economy, observational clues, observational case
observational logic » observational basis, observational model, observational cohort

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((observational cinema) OR (((observational clinical) OR (observational logic))))) OR (observational context)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((observational cinema) or (((observational clinical) OR (observational logic))))) or (observational context))".
• Adding a wildcard symbol may retrieve word variants: ((((observational cinema) or (((observational clinical) OR (observational logic))))) or (observational context))*.