Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cam thu » nam thu, cac thu, ca thu
te sach » toc sach
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
van cam » van nam, van lam, van cau
thu va » thuc va, thue va, tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang ma) or (tang ma)) hoi. hieu van cam thu va thanh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang ma) OR (tang ma)) hoi. hieu van cam thu va thanh vi ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) or (tang ma)) hoi. hieu van cam thu va thanh vi ((va triet) or (cua viet))*.