Perhaps you should try some spelling variations:
thong quang » thong quan, luong quang, thong dung
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
thong qua » thong quan, thong cua, thong tu
trong san » trong cac, cong san, dong san
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 xanh - hanh ((thong quang) or (thong qua)) dung trong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((thong quang) OR (thong qua)) dung trong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((thong quang) or (thong qua)) dung trong san toan ban*.