Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chat » tinh chat, trinh luat, trinh han
trinh cao » trinh chao, trinh co, tinh cao
trinh cau » trinh chao, trinh tu, trinh han
chat ban » nhat ban, chat ran, cua ban
van cac » van hac, van cau, van bac
lan van » luan van, lang van, tan van
cao lan » cao van, cao dang, cao tang
oi viet » hoi viet, o viet, cuoi viet
so viet » hoc viet
ban vat » bang vat, ben vat, ban va
cau van » chau van, cuu van, cac van
cay co » tay co, cay cong
cac co » cac cong
va cao » va cac, va co, va dao
cam co » nam co, lam co, cam lo
co hoi » co loi
ca cay » cua cay, cac cay, ca cac
vat ca » vat cua, vat va, vat co
va ca » va cac, va cai, va cau
co oi » co loi, co doi, co toi

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 chat ban vat ca cay ((co hoi) or (co hoc)) viet nam ) or ( chuong trinh cau van ((va ca) OR (va cao)) cay co oi viet nam ))) or ( chuong trinh cao lan van cac ((cam co) or (cac co)) so viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( chuong trinh chat ban vat ca cay ((co hoi) OR (co hoc)) viet nam ) OR ( chuong trinh cau van ((va ca) OR (va cao)) cay co oi viet nam ))) OR ( chuong trinh cao lan van cac ((cam co) OR (cac co)) so viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( chuong trinh chat ban vat ca cay ((co hoi) or (co hoc)) viet nam ) or ( chuong trinh cau van ((va ca) OR (va cao)) cay co oi viet nam ))) or ( chuong trinh cao lan van cac ((cam co) or (cac co)) so viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (((( chuong trinh chat ban vat ca cay ((co hoi) or (co hoc)) viet nam ) or ( chuong trinh cau van ((va ca) OR (va cao)) cay co oi viet nam ))) or ( chuong trinh cao lan van cac ((cam co) or (cac co)) so viet nam ))*.