Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
chieu sang » chieu sach, chieu xanh, hieu lang
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
trung ha » trung hoc, trung tam, trung cap
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: hoc chieu sang - thanh ((trung ha) or (truong thanh)) dung cong danh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - thanh ((trung ha) OR (truong thanh)) dung cong danh toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - thanh ((trung ha) or (truong thanh)) dung cong danh toan cao*.