Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cap » truong cao
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (chieu sach)) - thanh ((trung cap) OR (trung tam)) thong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sach)) - thanh ((trung cap) OR (trung tam)) thong cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (chieu sach)) - thanh ((trung cap) OR (trung tam)) thong cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sach)) - thanh ((trung cap) OR (trung tam)) thong cong dan than cau*.