Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sang » chieu sach, chieu xanh, hieu lang
tran thanh » van thanh, quan thanh
doi chieu » doc hieu, doi chi, mot chieu
ban thanh » ban hanh, ban hang
cong tac » cong ty
tac nha » tac nhan, trac nha, cac nha

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 ((tran thanh) or (ban thanh)) phuong cong tac nha cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((tran thanh) OR (ban thanh)) phuong cong tac nha cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((tran thanh) or (ban thanh)) phuong cong tac nha cao*.