Perhaps you should try some spelling variations:
managing land » managing demand, managing labor, managing large
yanling land » panning land, changing land, planning land
kang minh » kang minah, anh minh, kan min
sang minh » kang minah, anh minh, song min
congo shu » cong shu
a jin » a jine, a join, a win
wang » wing, wan, lang

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: wang ((yanling land) OR (managing land)) a jin ((kang minh) OR (sang minh)) congo shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yanling land) OR (managing land)) a jin ((kang minh) or (sang minh)) congo shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yanling land) OR (managing land)) a jin ((kang minh) or (sang minh)) congo shu ;*.