Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
ban trang » banh trang, ban trong, ban tran
trang van » tran van, trang va, trong van
van nhung » van nhuong, va nhung, van hung
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong ty
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 nhung ((cong thanh) OR (cong tan)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo tieu)) sach - ban trang van nhung ((cong thanh) OR (cong tan)) than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo tieu)) sach - ban trang van nhung ((cong thanh) OR (cong tan)) than ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo tieu)) sach - ban trang van nhung ((cong thanh) OR (cong tan)) than ban*.