Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
truong cua » truong ca, truong quan, truong cao
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
thong tu » phong tuc, thong tin, thong ke
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: hoc thieu sang - manh ((truong cua) or (thong tu)) dung cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - manh ((truong cua) OR (thong tu)) dung cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - manh ((truong cua) or (thong tu)) dung cong san toan ban*.