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, oi viet
lanh va » hanh va, anh va, doanh va
cac tay » cac cay, cac tac, cac tai
lan va » luan va, lan van, lang va
cac co » cac cong
co soi » cot soi, co so, co hoi
bac co » bac cao, bac bo, bac ho
tay co » ty co, cay co, tay o

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

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