Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sach thue » sach thieu, sach tham, cach thuc
thanh le » thinh le, thanh ve, thanh de
sach thu » sach thieu, sach tham, cach thuc
hang ca » hang va, nang cao, hang tai
va tuc » va thuc, va tu, va tac
ca tuc » cua tuc
ca hoi » cau hoi, cua hoi, xa hoi
le cua » ly cua

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 thu) or (sach thue)) hang ca hoi. hieu qua ((ca tuc) or (va tuc)) ban thanh le cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thue)) hang ca hoi. hieu qua ((ca tuc) OR (va tuc)) ban thanh le cua vat.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach thue)) hang ca hoi. hieu qua ((ca tuc) or (va tuc)) ban thanh le cua vat*.