Perhaps you should try some spelling variations:
introduction conventional » introduction international, introduction conceptual, introduction regional
conventional method » conventional methods
session state » session system, session soft, sessions stay
session short » session soft, dispersion short
session 1f » session 1, session 10, session 11

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

• Performing a fuzzy search may retrieve terms with similar spellings: introduction conventional method ((((session 1f) or (session state))) or (session short)) link~.
• If you are trying to use Boolean operators, they must be ALL CAPS: introduction conventional method ((((session 1f) OR (session state))) OR (session short)) link.
• Adding a wildcard symbol may retrieve word variants: introduction conventional method ((((session 1f) or (session state))) or (session short)) link*.