Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
nhieu tang » chieu sang, hieu lang, nhiet nang
bang trong » lang trong, ban trong, mang trong
trung can » trung cap, trung van, trong can
can bang » cao bang, can ban, van ban

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 xanh) or (nhieu tang)) - thanh trung can bang trong ((bai toan) or (bai tap)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (nhieu tang)) - thanh trung can bang trong ((bai toan) OR (bai tap)) cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (nhieu tang)) - thanh trung can bang trong ((bai toan) or (bai tap)) cau*.