Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh giao
trinh cau » trinh chat, trinh tu, trinh han
trinh co » trinh do, trinh cong, trinh hoa
soi viet » so viet, hoi viet, doi viet
oi viet » hoi viet, o viet, cuoi viet
co hanh » co thanh, co phanh, co anh
can cau » ban cau, cac cau, can chu
hanh va » hang va, hanh vi
van cau » van dau, van hau, van chat
ca cau » cac cau, cua cau, ca cac
lan va » luan va, lanh va, lan van
tay co » ty co, cay co
co oi » co hoi, co loi, co doi

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 co hanh va ((ca cau) or (((can cau) or (van cau)))) co oi viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac ((tay o) or (tay co)) soi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh co hanh va ((ca cau) OR (((can cau) OR (van cau)))) co oi viet nam ) OR ( chuong ((trinh cau) OR (trinh chao)) lan va cac ((tay o) OR (tay co)) soi viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh co hanh va ((ca cau) or (((can cau) or (van cau)))) co oi viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac ((tay o) or (tay co)) soi viet nam ))*.