Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, trinh cau
trinh sau » trinh san, trinh cau, trinh su
cao xuat » cao xuan, cac xuat, san xuat
cay cong » cac cong, cao cong, cau cong
cong soi » cong so, cong goi, cong noi
soi viet » so viet, hoi viet, oi viet
cac cau » cac mau, bac cau, cac cam
sau lan » dau luan
cac hat » cac chat, cac hoat, cau hat
cac nam » bac nam, cac cam, cac ham
cac cay » ca cay, cac cam, cac cap
co hoi » co hoc
lan va » luan va, lanh va, lan van
ky lan » ky dan, ky la
ca cau » can cau, cua cau, ca cac

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 xuat va cac cay cong soi viet nam ) or ((( chuong trinh ky lan va ((cac nam) or (cac hat)) ((co loi) or (co hoi)) viet nam ) or ( chuong trinh sau lan va ((cac cau) or (ca cau)) co _ viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao xuat va cac cay cong soi viet nam ) OR ((( chuong trinh ky lan va ((cac nam) OR (cac hat)) ((co loi) OR (co hoi)) viet nam ) OR ( chuong trinh sau lan va ((cac cau) OR (ca cau)) co _ viet nam )))).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao xuat va cac cay cong soi viet nam ) or ((( chuong trinh ky lan va ((cac nam) or (cac hat)) ((co loi) or (co hoi)) viet nam ) or ( chuong trinh sau lan va ((cac cau) or (ca cau)) co _ viet nam ))))*.