Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, trinh cau
soi viet » hoi viet, oi viet, doi viet
trinh do » trinh ky
trinh tu » trinh ky
loi viet » loai viet, hoi viet, oi viet
cac cay » ca cay, cac cam, cac cap
cao lan » cao van, cao dang, cao tang
cai cay » ca cay, cai cach, loai cay
so viet » hoc viet
co soi » cot soi, co hoi, co doi
cay co » cac co, tay co, cay cong
lan va » luan va, lanh va, lan van
va cai » va bai, va dai, va cao
co loi » co hoi

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 cao lan va cac cay co soi viet nam ) or ( chuong trinh cao lan va cac cay co so viet nam ))) or ( chuong ((trinh tu) OR (trinh do)) lan va cai cay co loi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( chuong trinh cao lan va cac cay co soi viet nam ) OR ( chuong trinh cao lan va cac cay co so viet nam ))) OR ( chuong ((trinh tu) OR (trinh do)) lan va cai cay co loi viet nam ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( chuong trinh cao lan va cac cay co soi viet nam ) or ( chuong trinh cao lan va cac cay co so viet nam ))) or ( chuong ((trinh tu) OR (trinh do)) lan va cai cay co loi viet nam ))*".