Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lan tranh » lanh tranh, luan tranh, can tranh
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
ho chau » ha chau, ho chu, khoa chau
o chau » a chau, 3 chau, moc chau

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

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