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

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ky nang ma hoi. hieu ve ((cam tuc) or (nam thuc)) van hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang ma hoi. hieu ve ((cam tuc) OR (nam thuc)) van hanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang ma hoi. hieu ve ((cam tuc) or (nam thuc)) van hanh vai cua viet*.