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
so viet » hoc viet
oi viet » hoi viet, o viet, cuoi viet
cac cam » cad cam, cac cap, cac cau
van cac » van hac, van cau, van bac
lan van » luan van, lang van, tan van
ban vat » bang vat, ben vat, ban va
cau van » chau van, cuu van, cac van
cao lan » cao van, cao dang, cao tang
cam co » cac co, nam co, lam co
vat ca » vat cua, vat va, vat co
ca cay » cua cay, cac cay, ca cac
co hoi » co hoc
cay co » cac co, tay co, cay cong
van va » van vat, van van, ban va
co oi » co doi, co toi, co o
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 chat ban vat ca cay ((co hoi) OR (co loi)) viet nam ) or ( chuong trinh cau van va ca cay co oi viet nam ))) or ( chuong trinh cao lan van cac cam 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 loi)) viet nam ) OR ( chuong trinh cau van va ca cay co oi viet nam ))) OR ( chuong trinh cao lan van cac cam 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 loi)) viet nam ) or ( chuong trinh cau van va ca cay co oi viet nam ))) or ( chuong trinh cao lan van cac cam co so viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (((( chuong trinh chat ban vat ca cay ((co hoi) OR (co loi)) viet nam ) or ( chuong trinh cau van va ca cay co oi viet nam ))) or ( chuong trinh cao lan van cac cam co so viet nam ))*.