Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh quang » nhanh quang, hang quang, huynh quang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
anh quang » anh xquang, anh quan, nhanh quang
va thong » va thuong, va phuong, he thong
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh quang) OR (anh quang)) va thong cong ((dan toan) OR (van toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh quang) or (anh quang)) va thong cong ((dan toan) or (van toan)) cau*.