Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, nhieu tang, hieu van
trung dap » trung cap, trung dai, trung dam
dap nhung » vap nhung, va nhung, dap ung
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 ((((hieu lang) OR (hieu quang))) or (chinh sach)) - thanh trung dap nhung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu lang) OR (hieu quang))) OR (chinh sach)) - thanh trung dap nhung cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((hieu lang) OR (hieu quang))) or (chinh sach)) - thanh trung dap nhung cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu lang) OR (hieu quang))) or (chinh sach)) - thanh trung dap nhung cong dan than cau*.