Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chat » tinh chat, trinh luat, trinh han
trinh cao » trinh chao, tinh cao, trinh cho
trinh cau » trinh chao, trinh tu, trinh han
chat ban » nhat ban, chat ran, cua ban
trinh co » trinh do, trinh cong, trinh hoa
cong hoi » cong nhoi, cong hoa, cong hai
hoi viet » hai viet, thai viet, cuoi viet
cong oi » cong goi, cong noi, cong soi
lan van » lang van, tan van, san van
oi viet » o viet, cuoi viet, gioi viet
cau van » chau van, cuu van, cac van
ban vat » bang vat, ben vat, ban va
cua cay » cua cac
so viet » hoc viet
van va » van vat, van van, ban va
ca cay » cac cay, ca cac, ca cao
cam co » cac co, nam co, cay co
luan » quan

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) OR (cua cay)) cong hoi viet nam ) or ( chuong trinh cau van va ((ca cay) OR (cua cay)) cong oi viet nam ))) or ( chuong ((trinh cao) or (trinh co)) ((lan van) or (luan van)) cad 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) OR (cua cay)) cong hoi viet nam ) OR ( chuong trinh cau van va ((ca cay) OR (cua cay)) cong oi viet nam ))) OR ( chuong ((trinh cao) OR (trinh co)) ((lan van) OR (luan van)) cad 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) OR (cua cay)) cong hoi viet nam ) or ( chuong trinh cau van va ((ca cay) OR (cua cay)) cong oi viet nam ))) or ( chuong ((trinh cao) or (trinh co)) ((lan van) or (luan van)) cad cam co so viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (((( chuong trinh chat ban vat ((ca cay) OR (cua cay)) cong hoi viet nam ) or ( chuong trinh cau van va ((ca cay) OR (cua cay)) cong oi viet nam ))) or ( chuong ((trinh cao) or (trinh co)) ((lan van) or (luan van)) cad cam co so viet nam ))*.