Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
phan duc » pham duc, phan tu, phan dau
tu sach » thu sach, su sach, te sach
hieu ve » hieu va
va hanh » van hanh, va thanh, va danh
tu sac » tu cac, tu san, tu bac
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) phan duc va hanh vi cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky nang x hoi. ((hieu ve) or (hieu van)) phan duc va hanh vi cua cu~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky nang x hoi. ((hieu ve) or (hieu van)) phan duc va hanh vi cua cu*.