Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
cong thanh » dong thanh, cong trinh, cong tan
thanh than » thanh thanh, thanh thang, thanh toan
thanh van » thanh toan, thanh phan, thanh nhan
dung cong » dung trong
ho chieu » hoc thieu, doi chieu, mot chieu
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 chieu)) sach - canh ((thanh van) OR (thanh san)) dung cong thanh than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - canh ((thanh van) OR (thanh san)) dung cong thanh than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) sach - canh ((thanh van) OR (thanh san)) dung cong thanh than ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) sach - canh ((thanh van) OR (thanh san)) dung cong thanh than ban*.