Perhaps you should try some spelling variations:
tranh trong » tran trong, trinh trong, anh trong
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
trong san » trong cac, cong san, dong san
san dung » van dung, dan dung, lan dung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - tranh trong san dung ((cong tan) OR (cong tac)) ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - tranh trong san dung ((cong tan) OR (cong tac)) ((toan cao) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - tranh trong san dung ((cong tan) OR (cong tac)) ((toan cao) or (van ban))".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - tranh trong san dung ((cong tan) OR (cong tac)) ((toan cao) or (van ban))*.