Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung don » nhung van, nhung bo
dung cong » dung trong
doan phan » doanh phan, toan phan, dan phan
tranh va » tranh van, trang va, trinh va
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (chieu xanh)) - canh tranh va ((nhung don) or (dung cong)) doan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - canh tranh va ((nhung don) OR (dung cong)) doan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - canh tranh va ((nhung don) or (dung cong)) doan phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - canh tranh va ((nhung don) or (dung cong)) doan phan cau*.