Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thong cong » trong cong, tong cong, thong thong
hieu lang » hieu quang, nhieu tang, hieu van
cua thong » cua thuong, cua khong, cua tong
anh nang » ganh nang, anh bang, anh dang
anh dong » anh huong, anh son
cong tac » cong ty
tac nhan » tao nhan, cac nhan, dac nhan
nhan cau » nhanh cau, phan cau, nhan sau

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