Perhaps you should try some spelling variations:
hieu va » lieu va, hieu qua
soc ban » hoc ban, so ban, soc ba
lai hoi » lai hoa, lai roi, mai hoi
dai hoi » dai hoc, dai hai, dai moi
coc ban » co ban, cac ban, hoc ban
va cham » va chat, va tham
vi cua » vai cua, di cua
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 va cham ((soc ban) OR (coc ban)) hanh vi 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 va cham ((soc ban) OR (coc ban)) hanh vi 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 va cham ((soc ban) OR (coc ban)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((lai hoi) or (dai hoi)). hieu va cham ((soc ban) OR (coc ban)) hanh vi cua te*.