Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh tra, thanh tuan
thanh toan » thanh hoa, thanh san, tinh toan
tuan thong » toan thong, tran thong, tuan phong
thong cong » trong cong, tong cong, thong thong
doi chieu » doi chi, ho chieu, mot chieu
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) sach - ((thanh tran) or (thanh toan)) tuan thong cong dan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) sach - ((thanh tran) OR (thanh toan)) tuan thong cong dan khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) sach - ((thanh tran) or (thanh toan)) tuan thong cong dan khan cap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) sach - ((thanh tran) or (thanh toan)) tuan thong cong dan khan cap*.