Perhaps you should try some spelling variations:
chiet tach » chieu sach
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dung cong
cong dan » cong san, cong tan, huong dan
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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

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