Perhaps you should try some spelling variations:
lanh tranh » lan tranh, hanh trinh, sach tranh
dong cong » duong cong, dung cong, dang cong
khi sach » khi sac, khoa sach, khau sach
cua dong » chua dong, cua cong, cua dang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh 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 khi sach - ((lanh tranh) or (canh tranh)) cua dong cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khi sach - ((lanh tranh) OR (canh tranh)) cua dong cong dan than cap.
• Adding a wildcard symbol may retrieve word variants: doi khi sach - ((lanh tranh) or (canh tranh)) cua dong cong dan than cap*.