Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
cong van » cong vang, cong san, song van
tuan cao » juan cao, quang cao, thuan cam
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: doi chieu xanh - thanh ((trung thanh) OR (truong thanh)) dung cong van ((tuan cao) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh ((trung thanh) or (truong thanh)) dung cong van ((tuan cao) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh ((trung thanh) or (truong thanh)) dung cong van ((tuan cao) OR (toan cao))*.