Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
nang mai » nang ma, nang tai, lang mai
cua viet » ca viet, hoa viet, cua vat
mai hoi » mai khoi, dai hoi, lai hoi
hieu le » hieu ve, hieu he, hieu ly
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
va thu » va thuc, van thu, va tu
thu va » thuc va, thue va, tu va
di cua » dai cua, doi cua, de cua

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 mai hoi. ((hieu le) or (hieu hien)) va thu va hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang mai hoi. ((hieu le) OR (hieu hien)) va thu va hanh di cua viet.
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang mai hoi. ((hieu le) or (hieu hien)) va thu va hanh di cua viet*.