Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh va » thanh van, hanh va, thanh ha
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
duc ban » duc tan, duc van, dua ban
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
va cua » va chua, via cua, ca cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang x hoi. hieu ((ve cam) or (va cam)) duc ban thanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((ve cam) OR (va cam)) duc ban thanh va cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((ve cam) or (va cam)) duc ban thanh va cua te*.