Perhaps you should try some spelling variations:
cai hoi » cau hoi, cai hoa, lai hoi
dai hoi » dai hoc, dai hai, dai moi
hieu va » lieu va, hieu qua
coc tuc » coc luc, hoc thuc, doc thuc
han tai » hang tai, nhan tai, van tai
tai cua » thai cua, tai cuc, tri cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va coc » va cuoc, va cac, va hoc
tuc va » thuc va, truc va, tuc xa
va han » va phan, van han, va hanh
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: su sac ky nang ((cai hoi) or (dai hoi)). hieu va coc tuc va han tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ((cai hoi) OR (dai hoi)). hieu va coc tuc va han tai cua te.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ((cai hoi) or (dai hoi)). hieu va coc tuc va han tai cua te*.