Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
nhung cong » dung cong, thong cong, hang cong
tieu sach » chieu sach, dien sach, te sach
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
tran van » luan van
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh tran van nhung cong ((dan toan) or (thanh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh tran van nhung cong ((dan toan) OR (thanh toan)) tap*.