Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
doc chieu » doc hieu, doi chieu, toc thieu
trung xay » trong xay, trung tam, trung cap
trung gay » trong gay, trung tam, trung cap
dung cong » dung trong
cong ban » cong bang, cong san, cong tan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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: doc chieu xanh - hanh ((trung xay) OR (trung gay)) dung cong ban ((than cau) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc chieu xanh - hanh ((trung xay) OR (trung gay)) dung cong ban ((than cau) or (than cap))~".
• Adding a wildcard symbol may retrieve word variants: doc chieu xanh - hanh ((trung xay) OR (trung gay)) dung cong ban ((than cau) or (than cap))*.