Perhaps you should try some spelling variations:
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xuc ban » duc ban, quoc ban, xuat ban
doi cua » dai cua, hoi cua
cuc ban » cua ban, cac ban, cuu ban
di cua » dai cua, de cua, do cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 va cham ((xuc ban) OR (cuc ban)) hanh ((di cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang cao hoi. hieu va cham ((xuc ban) OR (cuc ban)) hanh ((di cua) OR (doi cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang cao hoi. hieu va cham ((xuc ban) OR (cuc ban)) hanh ((di cua) or (doi cua)) tre*".