Perhaps you should try some spelling variations:
vu hanh » vu khanh, vu thanh, du hanh
hanh ky » hanh kem
nang xa » nang x, lang xa, nang ma
hieu le » hieu ve, hieu he, tieu le
hieu ly » hieu ky, lieu ly, dieu ly
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
na thu » nam thu, va thu, ma thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu hanh ky nang xa hoi. ((hieu le) or (hieu ly)) na thu ((va hanh) or (va danh)) dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu hanh ky nang xa hoi. ((hieu le) OR (hieu ly)) na thu ((va hanh) OR (va danh)) dai cua vat.
• Adding a wildcard symbol may retrieve word variants: vu hanh ky nang xa hoi. ((hieu le) or (hieu ly)) na thu ((va hanh) or (va danh)) dai cua vat*.