Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cam truc » cau truc, nam truc, lam truoc
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
van cam » van nam, van lam, van cau
so sinh » so sanh, so tinh, cho sinh
nang ma » sang ma, mang may
tang ma » mang may, tang van
sinh v » sinh va, sinh y, sinh vat
vi cua » vai cua, di cua

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

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