Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, tinh cao
trinh cau » trinh chat, trinh chao, trinh tu
cao lanh » cao lan, cao anh, cao danh
cac tai » cao tai, cac bai, cac dai
cac cay » ca cay, cac cam, cac cap
cau lan » cau lanh, cao lan, sau lan
so viet » hoc viet
lanh va » hanh va, anh va, lanh dao
nam co » nam cao, nam bo, nam so
cam co » cac co, cay co, lam co
lan va » luan va, lan van, lang va

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 lanh va cac ((cam co) or (nam co)) so viet nam ) or ( chuong trinh cau lan va ((cac cay) or (cac tai)) co so viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao lanh va cac ((cam co) OR (nam co)) so viet nam ) OR ( chuong trinh cau lan va ((cac cay) OR (cac tai)) co so viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao lanh va cac ((cam co) or (nam co)) so viet nam ) or ( chuong trinh cau lan va ((cac cay) or (cac tai)) co so viet nam ))*.