Perhaps you should try some spelling variations:
observational concepts » observation concepts, observational concerns, observational conceptual
observational clinical » observation clinical, observations clinical, observational logic
observational context » observational contacts, observation content, observationsin contexts
observational cinema » observational economy, observational case, observational plasma
observational clues » observational aspects, observational results, observational techniques

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 clues))) OR (((observational context) OR (observational concepts)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((observational cinema) OR (observational clinical))) or (observational clues))) or (((observational context) or (observational concepts))))".
• Adding a wildcard symbol may retrieve word variants: ((((((observational cinema) OR (observational clinical))) or (observational clues))) or (((observational context) or (observational concepts))))*.