Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
vat hanh » vat thanh, van hanh, va hanh
cam thuc » am thuc, nam thuc, cam thu
hieu ve » hieu va, hieu van
so sinh » so sanh, so tinh, cho sinh
tang ma » mang may, tang van
nang ma » sang ma, mang may
sinh v » sinh va, sinh y, sinh vat
ve cam » ve cham, ve cac, va cam
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 ve cam thuc vat 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 ve cam thuc vat 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 ve cam thuc vat hanh vi cua viet*.