Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
nhanh mang » nhanh lang, nhanh quang, nhanh thang
hoc thieu » toc thieu, hoc hien
hanh mang » hanh trang, nhanh lang, thanh hang
san toan » dan toan, 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 quang - ((hanh mang) OR (nhanh mang)) ung dung trong ((san toan) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - ((hanh mang) or (nhanh mang)) ung dung trong ((san toan) OR (van toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - ((hanh mang) or (nhanh mang)) ung dung trong ((san toan) OR (van toan)) cau*.