Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sang » chieu sach, chieu xanh, hieu lang
chang nang » chang wang, thong nang, chai nang
doi chieu » doc hieu, doi chi, ho chieu
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua thong » cua thuong, cua khong, cua tong
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, cong tan, huong dan
chan ban » can ban, chat ban, chan doan
chan nan » chan nhan, chan doan, chai nang

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 - hanh tinh cua thong cong dan ((chan ban) or (((chan nan) OR (chang nang))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh tinh cua thong cong dan ((chan ban) OR (((chan nan) OR (chang nang)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - hanh tinh cua thong cong dan ((chan ban) or (((chan nan) OR (chang nang))))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh tinh cua thong cong dan ((chan ban) or (((chan nan) OR (chang nang))))*.