Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
te sach » toc sach
ca viet » va viet, co viet, hoa viet
tuc va » thuc va, truc va, tuc xa
vai ca » vai cac, vai cua, bai ca
x hoi » xa hoi, o hoi, x ho

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 (te sach)) ky nang x hoi. hieu va cham ((duc va) or (tuc va)) hanh vai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang x hoi. hieu va cham ((duc va) OR (tuc va)) hanh vai ca viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang x hoi. hieu va cham ((duc va) or (tuc va)) hanh vai ca viet*.