Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
mot chieu » doi chieu, ho chieu
dap nhung » vap nhung, va nhung, dap ung
tac doanh » tac danh, toan doanh, trai doanh
cac doanh » cac dan, cac dang, van doanh
doc hieu » toc thieu, hoc thieu, hoc hien
tung dap » tung dan, trung dai, tuong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (mot chieu)) sach - thanh tung dap nhung cong ((tac doanh) OR (cac doanh)) tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (mot chieu)) sach - thanh tung dap nhung cong ((tac doanh) OR (cac doanh)) tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (mot chieu)) sach - thanh tung dap nhung cong ((tac doanh) OR (cac doanh)) tai".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (mot chieu)) sach - thanh tung dap nhung cong ((tac doanh) OR (cac doanh)) tai*.