Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
qua pham » quan pham, quy pham, qua cham
pham cuc » pham chuc, pham duc, pham cua
sach ty » sach y, sach tu, sach thu
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cuc ban » cua ban, cac ban, cuu ban
cua te » cua tu

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 xa) or (lang xa)) hoi. hieu qua pham cuc ban thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty ((nang xa) OR (lang xa)) hoi. hieu qua pham cuc ban thanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ty ((nang xa) or (lang xa)) hoi. hieu qua pham cuc ban thanh dai cua te*.