Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
doi chieu » doc hieu, doi chi, mot chieu
dong dang » duong dang, dong bang, dung dang
ho chieu » theo chieu, hoc thieu, mot chieu
tranh ha » thanh ha, trang ha, trinh ha
ha dong » hoat dong, van dong
ban cau » bang cau, ban can, van cau
van hau » van ha, van hai, van dau

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 (doi chieu)) sach - canh tranh ha dong dang thanh ((ban cau) or (van hau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - canh tranh ha dong dang thanh ((ban cau) OR (van hau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - canh tranh ha dong dang thanh ((ban cau) or (van hau))*.