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 tu » trinh ky, trinh do
loi viet » loai viet, hoi viet, oi viet
cot soi » cot loi, cong soi
cay cot » cay coc, cac cot, cay cat
cac cay » ca cay, cac cam, cac cap
cao lan » cao van, cao dang, cao tang
so viet » hoc viet
cot so » co so, mot so, con so
lan va » luan va, lanh va, lan van
tu lan » tu luan, tu lang, tu lanh
va cai » va bai, va cao
va dai » va dao, vi dai, va dau
cay co » cac co, tay co, cay cong
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 cot soi viet nam ) or ( chuong trinh cao lan va cac cay cot so viet nam ))) or ( chuong trinh tu lan ((va cai) OR (va dai)) 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 cot soi viet nam ) OR ( chuong trinh cao lan va cac cay cot so viet nam ))) OR ( chuong trinh tu lan ((va cai) OR (va dai)) 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 cot soi viet nam ) or ( chuong trinh cao lan va cac cay cot so viet nam ))) or ( chuong trinh tu lan ((va cai) OR (va dai)) cay co loi viet nam ))*".