Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cau » trinh chat, trinh chao, trinh tu
bang vat » bang va, dang vat, cang vat
cac cay » cac cam, cac cap, cac cau
van cac » van hac, van cau, van bac
tan van » tran van, tang van, luan van
cau tan » cau tao, cao tan, cau van
ban vat » ben vat, ban va, van vat
so viet » hoc viet
oi viet » hoi viet, cuoi viet, gioi viet
cay cao » chay cao, tay cao, ca cao
o viet » hoc viet
cay co » cac co, tay co, cay cong
ca cay » cua cay, ca cac, ca cao
va ca » va cac, va cao, va cai

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 luat ((ban vat) or (bang vat)) ca cay cao h((oi viet) or (o viet)) nam ) or ( chuong trinh ((cac van) or (cac dan)) va ca cay co ((oi viet) or (o viet)) nam ))) or ( chuong trinh cau tan van cac cay co so viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( chuong trinh luat ((ban vat) OR (bang vat)) ca cay cao h((oi viet) OR (o viet)) nam ) OR ( chuong trinh ((cac van) OR (cac dan)) va ca cay co ((oi viet) OR (o viet)) nam ))) OR ( chuong trinh cau tan van cac cay co so viet nam )).
• Adding a wildcard symbol may retrieve word variants: (((( chuong trinh luat ((ban vat) or (bang vat)) ca cay cao h((oi viet) or (o viet)) nam ) or ( chuong trinh ((cac van) or (cac dan)) va ca cay co ((oi viet) or (o viet)) nam ))) or ( chuong trinh cau tan van cac cay co so viet nam ))*.