Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung cam » trung tam, trung cap, trung nam
cam hoang » cap hoang, cau hoang, pham hoang
chi sang » chi lang, chi chang, khai sang
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
thi cao » thai cao, thi hao, thi bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi sang) or (chieu sang)) - thanh trung cam hoang ((cong dan) OR (cong san)) thi cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi sang) OR (chieu sang)) - thanh trung cam hoang ((cong dan) OR (cong san)) thi cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi sang) or (chieu sang)) - thanh trung cam hoang ((cong dan) OR (cong san)) thi cao*".