Perhaps you should try some spelling variations:
chuong trinh » cong trinh
chuong tinh » khuong tinh, thuong tinh, phuong trinh
trinh dan » trinh han, trinh san, trinh da
trinh dao » trinh da, trinh giao, trinh chao
tinh cao » tinh lao, tinh chat, tinh cach
hoi viet » hai viet, oi viet, thai viet
trinh do » trinh ky
trinh co » trinh cong, trinh hoa, trinh ky
cai cay » cac cay, cai cach, loai cay
cao van » cac van, dao van, cao dang
cua tay » cua cay, cua tam, cua tap
ca cay » cua cay, cac cay, ca cac
van va » van vat, van van, ban va
va cua » va chua, via cua, ca cua
do van » dao van, vo van, so van
tay co » ty co, tay o
co van » vo van, so van, ho van
co hoi » co hoc, co loi
cay co » cac co, cay cong
va cai » va cac, va bai, va dai
va ca » va cac, va cao, va cau

You may be able to get more results by adjusting your search query.

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