Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, cua tinh, cac tinh
cong danh » cuong danh, cong dan, cong thanh
tranh va » tranh van, trang va, trinh va
tuan ban » tuan bang, toan ban, luan ban
ha tinh » va tinh, may tinh
luan » quan, lan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chau tinh) OR (ha tinh)) - canh tranh va nhung cong danh ((tuan ban) OR (luan van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chau tinh) OR (ha tinh)) - canh tranh va nhung cong danh ((tuan ban) or (luan van))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chau tinh) OR (ha tinh)) - canh tranh va nhung cong danh ((tuan ban) or (luan van))*.