Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu xanh, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thong cong » trong cong, tong cong, thong thong
hieu lang » hieu quang, nhieu tang, hieu van
trung cap » truong cao, trung tam
cap thong » cap tong, chap thuong, phap thong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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) OR (chieu sach))) or (hieu lang)) - thanh trung cap thong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu sang) OR (chieu sach))) OR (hieu lang)) - thanh trung cap thong cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((chieu sang) OR (chieu sach))) or (hieu lang)) - thanh trung cap thong cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu sang) OR (chieu sach))) or (hieu lang)) - thanh trung cap thong cong dan than cau*.