Perhaps you should try some spelling variations:
mot chieu » doi chieu
tranh cua » doanh cua, manh cua
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dang, cua dong, qua dung
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
than ma » than man, than va, khan ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (ho chieu)) sach - canh tranh cua dung ((cong ban) OR (cong san)) than ma~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (ho chieu)) sach - canh tranh cua dung ((cong ban) OR (cong san)) than ma*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (ho chieu)) sach - canh tranh cua dung ((cong ban) OR (cong san)) than ma*".