Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh sau » trinh san, trinh cau, trinh mau
trinh cao » trinh chao, trinh co, trinh cau
soi viet » so viet, hoi viet, oi viet
trinh su » trinh tu, trinh san, trinh cau
cao lanh » cao lan, cao anh, cao danh
cac tai » cao tai, cac bai, cac dai
cac tap » cac cap, cac tac
lanh va » hanh va, anh va, lanh dao
lan va » luan va, lan van, lang va
cam co » cac co, cay co, lam co
co soi » cot soi, co so, co hoi
nam co » nam cao, nam bo, nam so

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)) soi viet nam ) or ( chuong ((trinh sau) or (trinh su)) lan va ((cac tap) or (cac tai)) co soi 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)) soi viet nam ) OR ( chuong ((trinh sau) OR (trinh su)) lan va ((cac tap) OR (cac tai)) co soi viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao lanh va cac ((cam co) or (nam co)) soi viet nam ) or ( chuong ((trinh sau) or (trinh su)) lan va ((cac tap) or (cac tai)) co soi viet nam ))*.