Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
nang cho » nang chon, ngang cho, nang cao
van hai » van ha, van chat, van hanh
vuc ban » vu ban, duc ban, cuc ban
van bac » van ban, van bao, van hac
sach ty » sach y, sach tu, sach thu
van cau » van dau, van hau, van chat
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang cho hoc. hieu ((((van cau) or (van bac))) or (van hai)) vuc ban thanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang cho hoc. hieu ((((van cau) OR (van bac))) OR (van hai)) vuc ban thanh vi cua cau*.