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

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