Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
cua phuong » cuu phuong, cuc phuong, luan phuong
doi chieu » doc hieu, doi chi, ho chieu
khoan cam » khoa cam, khoan va, phan cam
tung cua » trung cua, tuong cua, dung cua
cong san » cong tac
khan cap » khan ap, than cap, phan cac

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 - thanh tung cua phuong cong san ((khan cap) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh tung cua phuong cong san ((khan cap) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh tung cua phuong cong san ((khan cap) or (khoan cam))*.