Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trong van » trong cac
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » 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: hoc chieu xanh - thanh trong van ban ((cong dan) or (cong san)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - thanh trong van ban ((cong dan) OR (cong san)) ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh trong van ban ((cong dan) or (cong san)) ((toan cao) or (toan ban))*.