Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh co, trinh giao
trinh han » trinh quan
trinh cao » trinh co, tinh cao, trinh cho
trinh cau » trinh chat, trinh tu, trinh tai
hoi viet » hai viet, oi viet, thai viet
soi viet » so viet, oi viet, doi viet
lanh va » anh va, lanh dao, doanh va
cac cau » cac mau, bac cau, ca cau
hanh va » hang va, hanh vi
cay co » cac co, tay co, cay cong
lan va » luan va, lan van, lang va
co hoi » co hoc, co loi
cau co » cau do, cac co, dau co
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 ((lanh va) or (hanh va)) cac cau co hoi viet nam ) or ( chuong ((((trinh cau) OR (trinh han))) or (trinh chao)) lan va cac ((tay o) or (cay co)) soi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao ((lanh va) OR (hanh va)) cac cau co hoi viet nam ) OR ( chuong ((((trinh cau) OR (trinh han))) OR (trinh chao)) lan va cac ((tay o) OR (cay co)) soi viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh cao ((lanh va) or (hanh va)) cac cau co hoi viet nam ) or ( chuong ((((trinh cau) OR (trinh han))) or (trinh chao)) lan va cac ((tay o) or (cay co)) soi viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao ((lanh va) or (hanh va)) cac cau co hoi viet nam ) or ( chuong ((((trinh cau) OR (trinh han))) or (trinh chao)) lan va cac ((tay o) or (cay co)) soi viet nam ))*.