Perhaps you should try some spelling variations:
phuong quang » phung quang, thuong quang, phuong hoang
phuong quan » phuong quynh, thuong quang, thong quan
chieu sang » chieu sach, chieu xanh, hieu lang
hong bang » dong bang, hang ban, hong hanh
ho chieu » theo chieu, hoc thieu, doi chieu
cong ban » cong bang, cong san, cong tan
than cau » toan cau, phan cau, than cap

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 sang - thanh ((phuong quan) OR (phuong quang)) nhung ((cong ban) OR (hong bang)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh ((phuong quan) OR (phuong quang)) nhung ((cong ban) or (hong bang)) than cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh ((phuong quan) OR (phuong quang)) nhung ((cong ban) or (hong bang)) than cau*.