Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
doc chieu » doc hieu, doi chieu, toc thieu
cua trong » cua truong, cua trung, ca trong
qua trong » quan trong, qua trinh, qua song
cong tan » cong tac, cong san, cong ty
toan tap » toan ban

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 xanh - canh tranh ((cua trong) or (qua trong)) ((cong tan) OR (cong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu xanh - canh tranh ((cua trong) OR (qua trong)) ((cong tan) OR (cong thanh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc chieu xanh - canh tranh ((cua trong) or (qua trong)) ((cong tan) OR (cong thanh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: doc chieu xanh - canh tranh ((cua trong) or (qua trong)) ((cong tan) OR (cong thanh)) toan tap*.