Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hieu ve » hieu va
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cua cau » cua cac, cua chu, cua cay
tu sac » tu sach, tu san, tu bac
va cua » va chua, via cua, ca cua
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 cac)) ky nang x hoi. ((hieu ve) OR (hieu van)) pham duc va hanh va cua cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu cac)) ky nang x hoi. ((hieu ve) or (hieu van)) pham duc va hanh va cua cau~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu cac)) ky nang x hoi. ((hieu ve) or (hieu van)) pham duc va hanh va cua cau*.