Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van 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: doi chieu sang - hanh ((tang cua) OR (mang cua)) nhung cong tan ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh ((tang cua) or (mang cua)) nhung cong tan ((toan cau) or (toan ban))*.