Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
cong thanh » dong thanh, cong trinh, cong tan
anh quang » anh xquang, anh quan, nhanh quang
quang can » quang chan, quang cao, quang ban
cuon danh » cuong danh, cuoi dan, cum danh
ho chieu » theo chieu, hoc thieu, doi chieu
tuan cau » toan cau, quan cau, tuan cu
can ban » van ban, toan ban

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: ho chieu xanh - anh quang can ban ((cong thanh) OR (cuon danh)) tuan cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - anh quang can ban ((cong thanh) or (cuon danh)) tuan cau*.