Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thien quan » trien quang, lien quan, thien van
trung tuan » trung thanh, trung tam, tran tuan
trung cua » truong cua, trung cap, dung cua
dung cong » dung trong
cong lang » cong vang, cong luong, cong quang
lang dang » lang dong, dang dang, lang thang
dang bang » dong bang, dang dang, tang bang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) or (thien quan)) - thanh ((trung cua) OR (trung tuan)) dung cong lang dang bang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thien quan)) - thanh ((trung cua) OR (trung tuan)) dung cong lang dang bang.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thien quan)) - thanh ((trung cua) OR (trung tuan)) dung cong lang dang bang".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thien quan)) - thanh ((trung cua) OR (trung tuan)) dung cong lang dang bang*.