Perhaps you should try some spelling variations:
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
can cau » van cau, ban cau, cac cau
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
ca cau » cua cau, cac cau, ca cac

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 cao hoi. hieu ve cam tuc va dan ((ca cau) or (can cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang cao hoi. hieu ve cam tuc va dan ((ca cau) OR (can cau)) tren.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang cao hoi. hieu ve cam tuc va dan ((ca cau) or (can cau)) tren*.