Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
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
cua tre » cua te, cuu tre, cua triet
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
va cao » va cac, va co, va dao
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ky nang xa hoi. hieu va cao tuc ((va hanh) or (va dan)) dai ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky nang xa hoi. hieu va cao tuc ((va hanh) OR (va dan)) dai ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te san ky nang xa hoi. hieu va cao tuc ((va hanh) or (va dan)) dai ((cua tre) or (cua viet))*.