Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, tinh cao
trinh han » trinh quan
trinh cau » trinh chat, trinh chao, trinh tu
hoi viet » hai viet, oi viet, thai viet
cao lanh » cao lan, cao anh, cao danh
cac cac » cac cach, ca cac, cac bac
lanh va » hanh va, anh va, lanh dao
cac tai » cao tai, cac bai, cac dai
co hoi » co hoc, co loi
lan va » luan va, lan van, lang va
tai co » mai co, tai so, tri co

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