Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doc chieu » doc hieu, doi chieu, toc thieu
hoa lang » hoa dan, hoa van
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan cao » toan ban, toan tap
va lang » va nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc chieu tinh - canh tranh ((va lang) or (hoa lang)) ((cong dan) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu tinh - canh tranh ((va lang) OR (hoa lang)) ((cong dan) OR (cong tac)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doc chieu tinh - canh tranh ((va lang) or (hoa lang)) ((cong dan) or (cong tac)) toan cao*.