Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cam » va cham, va cao, va cai
cua cu » cua chu, cua cau, cua su
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((x ho) or (o hoi)). hieu ((va cam) OR (va cac)) duc va hanh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((x ho) OR (o hoi)). hieu ((va cam) OR (va cac)) duc va hanh vai cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((x ho) or (o hoi)). hieu ((va cam) OR (va cac)) duc va hanh vai cua cu".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((x ho) or (o hoi)). hieu ((va cam) OR (va cac)) duc va hanh vai cua cu*.