Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
canh tinh » hanh tinh, manh tinh, nhanh tinh
tuan bang » tuan dang, tuan hoang, thuat bang
vien anh » vien canh, dien anh, tien anh
ve nhung » va nhung, tu nhung
cong dan » cong san, cong tan, huong dan
dan tuan » doan tuan, van tuan, dan luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((vien anh) OR (viet anh)) - ((canh tinh) or (canh tranh)) ve nhung cong dan tuan bang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((vien anh) OR (viet anh)) - ((canh tinh) OR (canh tranh)) ve nhung cong dan tuan bang.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((vien anh) OR (viet anh)) - ((canh tinh) or (canh tranh)) ve nhung cong dan tuan bang".
• Adding a wildcard symbol may retrieve word variants: hoc ((vien anh) OR (viet anh)) - ((canh tinh) or (canh tranh)) ve nhung cong dan tuan bang*.