Perhaps you should try some spelling variations:
luong quan » thong quan, duong qua
nhung cong » dung cong, thong cong, hang cong
thanh toan » thanh hoa, thanh san, tinh toan
dung quan » dung quang, dung luan, dang quang
manh toan » anh tuan, tinh toan
bo sach » co sach, hoc sach
doi bo » noi bo

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi bo sach - hanh ((dung quan) or (luong quan)) nhung cong ((manh toan) OR (thanh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi bo sach - hanh ((dung quan) OR (luong quan)) nhung cong ((manh toan) OR (thanh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi bo sach - hanh ((dung quan) or (luong quan)) nhung cong ((manh toan) OR (thanh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: doi bo sach - hanh ((dung quan) or (luong quan)) nhung cong ((manh toan) OR (thanh toan)) cao*.