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
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, cong dong
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 tang luan nhung ((cong dan) 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 tang luan nhung ((cong dan) OR (huong dan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien tinh) or (tien minh)) - anh tang luan nhung ((cong dan) or (huong dan)) toan cao*.