Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh cau, tinh cao
trinh cac » trinh cau, trinh chat, trinh chao
thai viet » thi viet, tai viet, mai viet
soi viet » so viet, hoi viet, oi viet
dang vat » dang van, dong vat, dang nhat
trinh co » trinh do, trinh cong, trinh hoa
cac dang » cac dan, cac cong, cac van
co thai » do thai, ca thai, co hai
van vat » van chat, nhan vat
vat cua » mat cua, bat cua, dat cua
cua cay » cua cac
cay cot » cay co, cay coc, cac cot
cot soi » cot loi, cong soi
co lay » co may, co lao, co ly
ca cao » ca dao, cu cao, ca cac
ca cay » cac cay, ca cac, va cay
co van » cao van, vo van, so van
lay co » ly co, cay co, tay 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 co van vat cua cay cot soi viet nam ) or ((( chuong trinh cao dang vat ((ca cay) OR (ca cao)) co thai viet nam ) or ( chuong trinh cac dang vat co lay co thai 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 cao dang vat ((ca cay) OR (ca cao)) co thai viet nam ) OR ( chuong trinh cac dang vat co lay co thai 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 cao dang vat ((ca cay) OR (ca cao)) co thai viet nam ) or ( chuong trinh cac dang vat co lay co thai viet nam ))))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh co van vat cua cay cot soi viet nam ) or ((( chuong trinh cao dang vat ((ca cay) OR (ca cao)) co thai viet nam ) or ( chuong trinh cac dang vat co lay co thai viet nam ))))*.