Perhaps you should try some spelling variations:
thanh khung » thanh hung, thanh chuong, thanh phuong
khung luan » chung luan, dung luan, hang luan
dang trung » dung trung, dong trung, quang trung
trung dang » truong dang, trung dung, trong dang
doi chieu » doc hieu, doi chi, ho chieu
luan dang » luan nang, luan danh, luan dong
dang kha » dang khai, dang khoa, dang ha
kha cap » khan cap, khoa cap, khai cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (mot chieu)) sach - thanh khung luan dang trung dang kha cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (mot chieu)) sach - thanh khung luan dang trung dang kha cap*.