Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong huong » thong thuong, thong thong, thong cong
thong duong » tuong duong, thong dung, thong thuong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
trung cap » truong cao, trung tam
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) OR (chieu sach)) - thanh trung cap ((thong huong) or (thong duong)) dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - thanh trung cap ((thong huong) OR (thong duong)) dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - thanh trung cap ((thong huong) or (thong duong)) dan than ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - thanh trung cap ((thong huong) or (thong duong)) dan than ban*.