Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung tam, tran tuan, truong thanh
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
than cau » toan cau, phan cau, than cap
phan dau » phan tu, hang dau

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 ((trung tuan) or (trung thanh)) dung cong san ((than cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh ((trung tuan) OR (trung thanh)) dung cong san ((than cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh ((trung tuan) or (trung thanh)) dung cong san ((than cau) or (phan dau))*.