Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh cao » trinh co, trinh cau, tinh cao
chao van » hao van, thao van, chau van
doi viet » dai viet, hoi viet, oi viet
soi viet » hoi viet, oi viet, noi viet
so viet » hoc viet
cao van » cac van, dao van, cao dang
cac co » cac cong
va cai » va cac, va bai, va dai
van va » van vat, van van, ban va
va cho » van cho, va co, va che
va ca » va cac, va cao, va cau

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