Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam hoc » cao hoc, am hoc, cam hoa
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ky nang x hoi. ((hieu ve) OR (hieu va)) cam hoc va thanh vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang x hoi. ((hieu ve) OR (hieu va)) cam hoc va thanh vi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky nang x hoi. ((hieu ve) OR (hieu va)) cam hoc va thanh vi ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang x hoi. ((hieu ve) OR (hieu va)) cam hoc va thanh vi ((cua te) or (cua tu))*.