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
soi viet » so viet, hoi viet, doi viet
hai viet » thai viet, mai viet, tai viet
cac cau » cac mau, bac cau, ca cau
hanh va » hanh vi
oi viet » hoi viet, o viet, cuoi viet
co hai » co dai, co hoi, o hai
cau co » cau do, cac co, dau co
lan va » luan va, lanh va, lan van
cay co » cac co, tay co, cay cong
tay o » tay co

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 ((hanh va) or (hang va)) cac cau co hai viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac ((tay o) or (cay co)) ((soi viet) OR (oi viet)) nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao ((hanh va) OR (hang va)) cac cau co hai viet nam ) OR ( chuong ((trinh cau) OR (trinh chao)) lan va cac ((tay o) OR (cay co)) ((soi viet) OR (oi viet)) nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh cao ((hanh va) or (hang va)) cac cau co hai viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac ((tay o) or (cay co)) ((soi viet) OR (oi viet)) nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao ((hanh va) or (hang va)) cac cau co hai viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va cac ((tay o) or (cay co)) ((soi viet) OR (oi viet)) nam ))*.