Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hau thuc » huu thuc, ha thuc, mau thuc
nang xa » nang x, lang xa, nang ma
van hau » van ha, van hai, van dau
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
va sac » va cac, va suc, va san
sac ky » cac ky, sai ky
di cuu » di cua, dinh cuu
di cau » da cau, diem cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: va sac ky nang xa hoi. hieu van hau thuc va dinh ((di cuu) or (di cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va sac ky nang xa hoi. hieu van hau thuc va dinh ((di cuu) OR (di cau)) tre*.