Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
vai cua » dai cua, hai cua, lai cua
duc van » duc va, duc tan, duc manh
tu sac » tu sach, tu cac, tu san
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai
sac ky » cac ky, sai ky
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 ((5 hoi) or (o hoi)). hieu ((ve cam) OR (va cam)) duc van hanh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((5 hoi) OR (o hoi)). hieu ((ve cam) OR (va cam)) duc van hanh vai cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((5 hoi) or (o hoi)). hieu ((ve cam) OR (va cam)) duc van hanh vai cua cu".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((5 hoi) or (o hoi)). hieu ((ve cam) OR (va cam)) duc van hanh vai cua cu*.