Perhaps you should try some spelling variations:
managing labor » managed labor
managing land » managing demand, managing large, managing a
run gain » run pain
kang han » kang chen, kong hang, zhang han
run tan » run pain
yang c » yang _, yang 8, yang 4
c kang » _ kang, c kann

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wing or lang) ((managing land) or (managing labor)) ((run tan) OR (run gain)) yang c kang han ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wing OR lang) ((managing land) OR (managing labor)) ((run tan) OR (run gain)) yang c kang han ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wing or lang) ((managing land) or (managing labor)) ((run tan) OR (run gain)) yang c kang han ;*".