Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
nam thuc » nam thuoc, am thuc, nam thu
cam tuc » cam xuc, cam tu, dam thuc
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y ((nang ma) OR (tang ma)) hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((nang ma) OR (tang ma)) hoi. hieu ve ((cam tuc) OR (nam thuc)) va hanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang ma) OR (tang ma)) hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: vu sach y ((nang ma) OR (tang ma)) hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh vai cua viet*.