Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
thieu sang » chieu sang, thieu khang, thieu quang
trung tuan » trung thanh, trung tam, tran tuan
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
cong sang » cong san, cong lang, cong vang
thanh lap » thanh san, phan lap, thanh hai
than cap » khan cap, thanh cac, than cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((trung cua) OR (trung tuan)) thuong cong sang ((than cap) OR (thanh lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh ((trung cua) or (trung tuan)) thuong cong sang ((than cap) OR (thanh lap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((trung cua) or (trung tuan)) thuong cong sang ((than cap) OR (thanh lap))*.