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
dao tuc » dao duc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
te van » le van, te va, ve van
va dao » ca dao

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

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