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
hang cua » hang ca, huong cua, thong cua
mang cua » manh cua, dung cua, ban cua
cong dan » cong san, cong tan, huong dan
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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 ((hang cua) OR (mang cua)) nhung cong dan ((phan cau) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - hanh ((hang cua) or (mang cua)) nhung cong dan ((phan cau) OR (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh ((hang cua) or (mang cua)) nhung cong dan ((phan cau) OR (phan dau))*.