Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cau » trinh chat, trinh chao, trinh tu
trinh cac » trinh chat, trinh chao, trinh cham
luat ban » luat bao, luat dan, luat bat
chat cay » chat cam, chat cao, chat gay
van chat » cao chat
vat cua » mat cua, bat cua, dat cua
tao van » thao van, tao va, dao van
ban vat » bang vat, ben vat, ban va
cua cay » cua cac
so viet » hoc viet
oi viet » hoi viet, cuoi viet, gioi viet
cac van » cac dan
cay cao » chay cao, tay cao, ca cao
o viet » hoc viet
ca cay » cac cay, ca cac, ca cao
cay co » cac co, tay co, cay cong
van va » van vat, van van, ban va
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 cua cay cao h((oi viet) or (o viet)) nam ) or ( chuong trinh cac van va ca cay co ((oi viet) or (o viet)) nam ))) or ( chuong trinh cau tao van chat cay co so viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( chuong trinh luat ban vat cua cay cao h((oi viet) OR (o viet)) nam ) OR ( chuong trinh cac van va ca cay co ((oi viet) OR (o viet)) nam ))) OR ( chuong trinh cau tao van chat cay co so viet nam )).
• Adding a wildcard symbol may retrieve word variants: (((( chuong trinh luat ban vat cua cay cao h((oi viet) or (o viet)) nam ) or ( chuong trinh cac van va ca cay co ((oi viet) or (o viet)) nam ))) or ( chuong trinh cau tao van chat cay co so viet nam ))*.