Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cac » trinh cau, trinh chat, trinh chao
chau cay » chau au, chau a, cua cay
van chau » van chat, van cau, van hau
luat ban » luat bao, luat dan, luat bat
cau van » chau van, cac van, cao van
cau tan » cau tao, cao tan, cau thang
cac ban » cac dan, cac van, can ban
oi viet » hoi viet, cuoi viet, gioi viet
ban vat » bang vat, ben vat, van vat
so viet » hoc viet
o viet » hoc viet
cay co » cac co, tay co, cay cong
ca cay » cua cay, cac cay, ca cac
vat ca » vat cua, vat va, vat co
va ca » va cac, va cao, va cai
co h » cao h, co ho, co _

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