Perhaps you should try some spelling variations:
trong quang » truong quang, thong quang, trong quan
hanh trong » hanh trang, anh trong, hinh trong
chieu xanh » chieu sach, chieu sang, chieu tinh
quang dung » quang trung, ung dung, cuong dung
hieu manh » hieu nganh, dieu hanh, hien hanh
phong van » phung van, thong van, phong va
hong van » hoang van, thong van, song van
tuan cu » tuan tu, quan cua, tuan thu

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 ((hieu manh) OR (chieu xanh)) - hanh trong quang dung ((hong van) OR (phong van)) tuan cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu xanh)) - hanh trong quang dung ((hong van) OR (phong van)) tuan cu~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - hanh trong quang dung ((hong van) OR (phong van)) tuan cu*.