Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
phan duc » pham duc, phan tu, phan dau
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va
tu sac » tu sach, tu cac, tu san
cua cu » cua chu, cua cau, cua su
sac ky » cac ky, sai ky
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ky nang ((x hoi) OR (o hoi)). ((hieu ve) OR (hieu van)) phan duc va hanh vai cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((x hoi) OR (o hoi)). ((hieu ve) or (hieu van)) phan duc va hanh vai cua cu~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((x hoi) OR (o hoi)). ((hieu ve) or (hieu van)) phan duc va hanh vai cua cu*.