Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
trung ha » trung hoc, trung tam, trung cap
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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: doi chieu xanh - thanh ((truong cao) OR (trung ha)) nhung cong ((dan than) OR (dan chan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh ((truong cao) or (trung ha)) nhung cong ((dan than) OR (dan chan)) cao~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh ((truong cao) or (trung ha)) nhung cong ((dan than) OR (dan chan)) cao*.