Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
ve cham » va cham, ve chat, vu cham
hoc ban » hoc bang, hoc dan, hoc bai
lai hoi » lai hoa, lai roi, mai hoi
vai cua » dai cua, hai cua, lai cua
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
soc ban » coc ban, so ban, soc ba
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu

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 ((lai hoi) or (dai hoi)). hieu ve cham ((soc ban) OR (hoc ban)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((lai hoi) OR (dai hoi)). hieu ve cham ((soc ban) OR (hoc ban)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((lai hoi) or (dai hoi)). hieu ve cham ((soc ban) OR (hoc ban)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((lai hoi) or (dai hoi)). hieu ve cham ((soc ban) OR (hoc ban)) hanh vai cua te*.