Perhaps you should try some spelling variations:
cuoc ban » quoc ban, buoc ban, coc ban
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
cac cuoc » cac nuoc, ca cuoc, cac quoc
cua can » cua cac, cua ban, cua dan
cua cau » cua cac, cua cay, cua cu
hanh di » hanh vi, hanh de, hang di
te sach » toc sach
sach ty » sach y, sach tu, sach thu
van cac » van hac, van cau, van bac
cao hoc » co hoc, cho hoc, chat hoc
ty nang » ky nang, ty xang, ty hang
cua chu » sua chua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang cao hoc. hieu van cac cuoc ban hanh di ((((cua cau) or (cua can))) or (cua chu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang cao hoc. hieu van cac cuoc ban hanh di ((((cua cau) OR (cua can))) OR (cua chu))*.