Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh qua » trinh quan, trinh cua, trinh luat
dung cong » dung trong
cong bang » cuong bang, dong bang, hong bang
bang toan » bong toan, dang toan, bang thanh
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 chieu xanh - hanh ((trinh qua) or (trinh quang)) dung cong bang toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((trinh qua) OR (trinh quang)) dung cong bang toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((trinh qua) or (trinh quang)) dung cong bang toan ban*.