Perhaps you should try some spelling variations:
"Central Asia research process series." » "Central Asia research projects series.", "Central Asia research project series.", "Central Asia research programs series.", "Central Asia research processes series.", "Central Asia research press series.", "Central Asia research processing series."
"central asia research focus spring." » "central basic research focus spring.", "central media research focus spring.", "central china research focus spring.", "central asia research focus springer."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Central Asia research process series.") or ("central asia research focus spring."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("Central Asia research process series.") OR ("central asia research focus spring.")).
• Removing quotes may allow a broader search: (( Central Asia research process series. ) or ( central asia research focus spring. )).
• Adding a wildcard symbol may retrieve word variants: (("Central Asia research process series.") or ("central asia research focus spring."))*.