Perhaps you should try some spelling variations:
tranh chua » tranh cua, trinh chuan, tranh chap
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
chua dang » cua dang, chua dong, chua nang
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (hieu lang)) - canh tranh chua dang cong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (hieu lang)) - canh tranh chua dang cong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (hieu lang)) - canh tranh chua dang cong dan ((toan cao) or (toan ban))*.