Perhaps you should try some spelling variations:
trung thanh » truong thanh
thieu sang » chieu sang, thieu khang, thieu quang
trung tuan » trung tam, tran tuan, truong thanh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cap » khan cap, thanh lap, thanh cac

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 tuan) OR (trung thanh)) thong cong ban than cap~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((trung tuan) or (trung thanh)) thong cong ban than cap*.