Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
van hanh » van thanh, ban hanh, van anh
khach ky » hanh ky, thanh ky
va hanh » va thanh, va danh, ban hanh
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
te cua » tue cua, le cua, de cua
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai
ma hoi » mai hoi, xa hoi, ma hoa

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 tang ma hoi. hieu ((ve cam) or (va cam)) xuc ((va hanh) OR (van hanh)) te cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky tang ma hoi. hieu ((ve cam) OR (va cam)) xuc ((va hanh) OR (van hanh)) te cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky tang ma hoi. hieu ((ve cam) or (va cam)) xuc ((va hanh) OR (van hanh)) te cua vat*".