Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh phi » thanh pho, thanh phan, thanh pham
phan cong » thanh cong
cong cong » cong dong, trong cong, dung cong
hieu van » hieu va, thien van, lieu va
phi phan » phoi phan, chi phan, phe phan
cong sat » cong suat, cong san, cong hat
sat phan » sat nhan, vat phan, xuat phan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) OR (hieu van)) - thanh phi phan cong cong sat phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu sang) OR (hieu van)) - thanh phi phan cong cong sat phan lap*".