Perhaps you should try some spelling variations:
luan nhung » luan chung, luan hung, quan nhung
tien tinh » tien thinh, tien trinh, thien tinh
tien minh » trien minh, lien minh, tien manh
bang luan » tang luan, hang luan, dung luan
anh bang » anh hoang, anh quang, tinh bang
cong san » cong tac
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien tinh) or (tien minh)) - anh bang luan nhung ((cong san) or (huong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien tinh) OR (tien minh)) - anh bang luan nhung ((cong san) OR (huong dan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien tinh) or (tien minh)) - anh bang luan nhung ((cong san) or (huong dan)) toan cao*.