Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh giao
trinh cac » trinh cau, trinh chat, trinh cham
lanh bao » lanh dao, doanh bao, lanh bang
trinh co » trinh do, trinh cong, trinh hoa
cac dang » cao dang, cac dan, cac cong
cot soi » cot loi, cong soi
dang va » dang van, dang vat, hang va
cac tap » cac cap, cac tac, cac tai
co hoi » co hoc, co loi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cac dang va cac tap ((co hoi) OR (cot soi)) viet nam ) OR ( chuong ((trinh chao) OR (trinh co)) lanh bao cao chat ((do choi) OR (tro choi)) viet nam ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh cac dang va cac tap ((co hoi) or (cot soi)) viet nam ) or ( chuong ((trinh chao) or (trinh co)) lanh bao cao chat ((do choi) OR (tro choi)) viet nam ))~".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cac dang va cac tap ((co hoi) or (cot soi)) viet nam ) or ( chuong ((trinh chao) or (trinh co)) lanh bao cao chat ((do choi) OR (tro choi)) viet nam ))*.