Perhaps you should try some spelling variations:
luan quang » luat quang, quan quang, xuan quang
chieu xanh » chieu sach, chieu sang, chieu tinh
quang dung » quang trung, ung dung, cuong dung
hieu manh » hieu nganh, dieu hanh, hien hanh
hieu lang » chieu sang, hieu quang, nhieu tang
hang luan » tang luan, dung luan
trong van » trong cac
van toan » van tuan, van tan, van 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 ((((hieu manh) OR (chieu xanh))) or (hieu lang)) - hang luan quang dung trong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (chieu xanh))) OR (hieu lang)) - hang luan quang dung trong van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hieu manh) OR (chieu xanh))) or (hieu lang)) - hang luan quang dung trong van toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) OR (chieu xanh))) or (hieu lang)) - hang luan quang dung trong van toan ban*.