Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
nhung cong » dung cong, thong cong, hang cong
thanh than » thanh thanh, thanh thang, thanh toan
trang van » tran van, trong van, tang van
ho chieu » theo chieu, hoc thieu, doi chieu
trang va » tran van, hang va
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo tieu)) sach - ban ((trang van) OR (trang va)) nhung cong thanh than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo tieu)) sach - ban ((trang van) OR (trang va)) nhung cong thanh than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo tieu)) sach - ban ((trang van) OR (trang va)) nhung cong thanh than ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo tieu)) sach - ban ((trang van) OR (trang va)) nhung cong thanh than ban*.