Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
dong cua » dung cua, cong cua, huong cua
vat dung » van dung, va dung, viet dung
hieu van » thien van, lieu va, hieu ve
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc vat » thuc vat, tuc va, tuc hat
lang xa » lang ha, dang xay, lang van
doi cua » dai cua, hoi cua
ky lang » ky nang, ky dang, ky tang

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 lang xa hoi. ((hieu va) or (hieu van)) cam tuc vat dung ((doi cua) OR (dong cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky lang xa hoi. ((hieu va) OR (hieu van)) cam tuc vat dung ((doi cua) OR (dong cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky lang xa hoi. ((hieu va) or (hieu van)) cam tuc vat dung ((doi cua) OR (dong cua)) tre".
• Adding a wildcard symbol may retrieve word variants: vu khach ky lang xa hoi. ((hieu va) or (hieu van)) cam tuc vat dung ((doi cua) OR (dong cua)) tre*.