Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh dao » trinh do, trinh da, trinh dan
trinh cau » trinh chat, trinh tu, trinh han
soi viet » so viet, hoi viet, doi viet
dao hanh » dao thanh, dang hanh, ban hanh
cac cau » cac mau, bac cau, cac cam
oi viet » hoi viet, o viet, cuoi viet
can cau » van cau, ban cau, can chu
hanh va » hang va, hanh vi
cac co » cac cong
tay co » cay co
lan va » luan va, lanh va, lan van
ca cau » cua cau, ca cac, co cau
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 dao hanh va ((cac cau) or (((can cau) or (ca cau)))) co oi viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac ((((tay o) or (((tay co) or (ty co))))) or (cac co)) soi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh dao hanh va ((cac cau) OR (((can cau) OR (ca cau)))) co oi viet nam ) OR ( chuong ((trinh cau) OR (trinh chao)) lan va cac ((((tay o) OR (((tay co) OR (ty co))))) OR (cac co)) soi viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh dao hanh va ((cac cau) or (((can cau) or (ca cau)))) co oi viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac ((((tay o) or (((tay co) or (ty co))))) or (cac co)) soi viet nam ))*.