Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
thanh vi » hanh vi, thanh va, thanh ve
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
o lang » hoa lang, hoi lang
luc va » duc va, tuc va
loc va » hoc va
vi cua » vai cua, di cua
cua te » cua tu

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 o lang xa hoi. ((hieu ve) or (hieu va)) cam ((luc va) or (loc va)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach o lang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) OR (loc va)) thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: vu khach o lang xa hoi. ((hieu ve) or (hieu va)) cam ((luc va) or (loc va)) thanh vi cua te*.