Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
luan thang » luan thanh, xuan thang, luan tang
thang long » thanh cong
chua xang » chua nang, chuc nang, chu bang
chu xanh » chu manh, chieu xanh, chuc danh
long van » luong van, song van, lang van
toan 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: theo ((chu xanh) OR (chua xang)) - canh tranh luan thang long van ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chua xang)) - canh tranh luan thang long van ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) OR (chua xang)) - canh tranh luan thang long van ((toan tap) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) OR (chua xang)) - canh tranh luan thang long van ((toan tap) or (toan ban))*.