Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
cong khanh » cong thanh, cong khan, cong nhan
hong hanh » dong thanh, cong thanh, hong ha
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - thanh ((cong khanh) or (hong hanh)) dung cong tac ((phan cau) OR (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh ((cong khanh) OR (hong hanh)) dung cong tac ((phan cau) OR (phan cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh ((cong khanh) or (hong hanh)) dung cong tac ((phan cau) OR (phan cac))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh ((cong khanh) or (hong hanh)) dung cong tac ((phan cau) OR (phan cac))*.