Perhaps you should try some spelling variations:
bai thanh » ban thanh, tai thanh, mai thanh
thu sach » tu sach, thuat sach, thuoc sach
thanh do » thanh de, thanh pho, thanh hoa
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hoc bai » hoc dai, hoc giai
am hoc » ad hoc
do cua » doi cua, co cua, de cua
cua te » cua tu
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ((van hoa) or (van hoc)). hieu va am hoc bai thanh do cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((van hoa) OR (van hoc)). hieu va am hoc bai thanh do cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((van hoa) or (van hoc)). hieu va am hoc bai thanh do cua te*.