Perhaps you should try some spelling variations:
truong dao » truong dai, truong cao, truong bo
hieu sang » chieu sang, hieu lang, hieu quang
truong va » truong dai, truong cao, luong va
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
doc hieu » toc thieu, hoc thieu, hoc hien
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sang - thanh ((truong va) or (truong dao)) dung cong manh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - thanh ((truong va) OR (truong dao)) dung cong manh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - thanh ((truong va) or (truong dao)) dung cong manh ((toan cau) or (toan ban))*.