Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh cao » trinh co, tinh cao, trinh cho
trinh cau » trinh chat, trinh tu, trinh han
cao lanh » cao lan, cao anh, cao danh
lanh va » hanh va, anh va, lanh dao
cac cac » cac cach, ca cac, cac bac
cac tay » cac cay, cac tac, cac tai
lan va » luan va, lan van, lang va
co hoi » co hoc, co loi
co oi » co loi, co doi, co toi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( chuong trinh cao lanh va ((cac cac) or (cuoc cach)) ((co oi) OR (co hoi)) viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac tay ((co oi) OR (co hoi)) viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao lanh va ((cac cac) OR (cuoc cach)) ((co oi) OR (co hoi)) viet nam ) OR ( chuong ((trinh cau) OR (trinh chao)) lan va cac tay ((co oi) OR (co hoi)) viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh cao lanh va ((cac cac) or (cuoc cach)) ((co oi) OR (co hoi)) viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac tay ((co oi) OR (co hoi)) viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao lanh va ((cac cac) or (cuoc cach)) ((co oi) OR (co hoi)) viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac tay ((co oi) OR (co hoi)) viet nam ))*.