Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thi thien » thi hien, thi chien, thua thien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban

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

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