Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
cua thong » cua thuong, cua khong, cua tong
nhanh cau » nhanh cay, thanh chau, nhanh ha
anh nang » ganh nang, anh bang, anh dang
anh dong » anh huong, anh son
cong tac » cong ty
nhan cau » phan cau, nhan sau, nhin cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((anh nang) or (anh dong)) cua thong cong tac ((nhan cau) OR (nhanh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((anh nang) OR (anh dong)) cua thong cong tac ((nhan cau) OR (nhanh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((anh nang) or (anh dong)) cua thong cong tac ((nhan cau) OR (nhanh cau))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((anh nang) or (anh dong)) cua thong cong tac ((nhan cau) OR (nhanh cau))*.