Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh cau, tinh cao
hai viet » thai viet, mai viet, tai viet
van chat » cao chat
hoi viet » oi viet, thai viet, cuoi viet
dang van » hoang van, hang va
trinh co » trinh do, trinh cong, trinh hoa
chat cua » nhat cua, chat va, chat huu
dang vat » dong vat, dang nhat, hang va
soi viet » so viet, oi viet, doi viet
cot soi » cot loi, cong soi
cay cot » cay coc, cac cot, cay cat
van vat » nhan vat
cua cay » cua cac
vat cua » mat cua, bat cua, dat cua
ca cay » cac cay, ca cac, ca cao
cay co » cac co, tay co, cay cong
co van » cao van, vo van, so van

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