Perhaps you should try some spelling variations:
vat nang » van nang, va nang, vat mang
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
cao luc » bao luc, cao duc, cao suc
va danh » va dinh, va hanh, dia danh
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao
va dan » ca dan, va dao, va dau
sinh » dinh, minh, kinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh vat nang xa hoi. lieu va cao luc ((va danh) or (va dan)) di ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh vat nang xa hoi. lieu va cao luc ((va danh) OR (va dan)) di ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: hoc sinh vat nang xa hoi. lieu va cao luc ((va danh) or (va dan)) di ((cua tre) or (su triet))*.