Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh cau, tinh cao
noi tiet » noi tieng, chi tiet
noi viet » hoi viet, doi viet, nhi viet
trinh co » trinh do, trinh cong, trinh hoa
so viet » hoc viet
cao lan » cao dang, cao tang, cao bang
cao van » cac van, dao van, cao dang
lan van » luan van, lang van, tan van
oi viet » hoi viet, o viet, cuoi viet
cay co » cac co, tay co, cay cong
cao co » cao cho, cac co, co co
ca cac » cua cac
ca cay » cua cay, cac cay, va cay
co van » vo van, so van, do van
van va » van vat, van van, ban va
ca cao » ca dao, cu cao, va cao
va ca » va cao, va cai, va cau
co oi » co hoi, co loi, co doi

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 van va ca cao co so viet nam ) OR ( chuong trinh co van va ca cay co oi viet nam ))) OR ( chuong trinh cao lan van ((ca cac) OR (va cac)) cot ((noi viet) OR (noi tiet)) nam ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( chuong trinh cao van va ca cao co so viet nam ) or ( chuong trinh co van va ca cay co oi viet nam ))) or ( chuong trinh cao lan van ((ca cac) OR (va cac)) cot ((noi viet) or (noi tiet)) nam ))~".
• Adding a wildcard symbol may retrieve word variants: (((( chuong trinh cao van va ca cao co so viet nam ) or ( chuong trinh co van va ca cay co oi viet nam ))) or ( chuong trinh cao lan van ((ca cac) OR (va cac)) cot ((noi viet) or (noi tiet)) nam ))*.