Perhaps you should try some spelling variations:
khang luan » hang luan, khanh luan, khung luan
canh manh » lanh manh, canh tranh, cach mang
tan khang » van khang, tao khang, tinh khang
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh

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

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