Perhaps you should try some spelling variations:
planning chain » planning china, planning can, planning case
planning gain » planning against, planning guide, planning using
china wang » china yang, china chang, china zhang
yang jing » wang jing, yang jin, huang jing
yang tin » yang jin, yang lin, yang mind
tan » than

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

• Performing a fuzzy search may retrieve terms with similar spellings: wing ((planning chain) OR (planning gain)) china wang ((yang tin) or (yang jing)) hong tan ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing ((planning chain) OR (planning gain)) china wang ((yang tin) OR (yang jing)) hong tan ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wing ((planning chain) OR (planning gain)) china wang ((yang tin) or (yang jing)) hong tan ;*".