Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
anh quang » anh xquang, anh quan, nhanh quang
quang cua » quan cua, quang tuan, quang huy
cua nhung » va nhung
cong van » cong vang, song van, cong tan
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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 ((hien xanh) OR (hien nhanh)) - anh quang cua nhung ((cong van) OR (cong san)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien nhanh)) - anh quang cua nhung ((cong van) OR (cong san)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - anh quang cua nhung ((cong van) OR (cong san)) toan cau*.