Perhaps you should try some spelling variations:
luan dung » lan dung, luan dong, luan hung
tang luan » dung luan
theo yeu » theo tieu, thiet yeu, theo chu
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, cong dong
toan cau » toan cao, toan ban, toan tap
theo te » theo tu, theo tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo te) or (theo yeu)) sach - anh tang luan dung ((cong dan) or (huong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo te) OR (theo yeu)) sach - anh tang luan dung ((cong dan) OR (huong dan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo te) or (theo yeu)) sach - anh tang luan dung ((cong dan) or (huong dan)) toan cau*.