Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
cong doan » cong dan, cong hoan, dong doanh
doan phan » doanh phan, toan phan, dan phan
va huong » va thuong, va phuong, va tuong
phan dau » phan tu, hang dau
va dung » van dung, va duong, vat dung

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 ((va dung) or (va huong)) cong doan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - thanh trung ((va dung) OR (va huong)) cong doan phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - thanh trung ((va dung) or (va huong)) cong doan phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - thanh trung ((va dung) or (va huong)) cong doan phan dau*.