Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - thanh ((((trang va) OR (hang va))) OR (tran van)) nhung cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh ((((trang va) OR (hang va))) or (tran van)) nhung cong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh ((((trang va) OR (hang va))) or (tran van)) nhung cong dan toan cao*.