Perhaps you should try some spelling variations:
tai chau » lai chau, hai chau, thi chau
mai chau » lai chau, moc chau, a chau
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
va hanh » van hanh, va thanh, va danh
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cai ky nang xa hoi. hieu va cao tuc va hanh ((tai chau) OR (mai chau)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ky nang xa hoi. hieu va cao tuc va hanh ((tai chau) OR (mai chau)) tre".
• Adding a wildcard symbol may retrieve word variants: tu cai ky nang xa hoi. hieu va cao tuc va hanh ((tai chau) OR (mai chau)) tre*.