Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
cong bang » cuong bang, dong bang, hong bang
bang than » bang thanh, ban than, sang than
ho chieu » hoc thieu, doi chieu, mot chieu
than cap » khan cap, thanh lap, thanh cac
cap han » cap phan, cap hay, cap van
cap can » cap van, tap can, cap bang

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 - thanh cong ((cap han) OR (cap can)) cong bang than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - thanh cong ((cap han) OR (cap can)) cong bang than cap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) sach - thanh cong ((cap han) OR (cap can)) cong bang than cap*".