Perhaps you should try some spelling variations:
trinh pham » trinh phan, trinh phap, trinh cham
trinh cau » trinh chat, trinh chao, trinh tu
pham anh » pham thanh, pham minh, pham van
cau danh » cao danh, chuc danh, nam danh
cac cau » cac mau, bac cau, ca cau
so viet » hoc viet
nam co » nam cao, nam bo, nam so
va bac » van bac, va bao, va ban
anh va » hanh va
do soi » do moi, do sai, do voi
do son » dong son

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 cau danh ((va bac) OR (va bai)) nam co so viet nam ) or ( cong trinh pham anh va cac cau ((do soi) or (do son)) viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cau danh ((va bac) OR (va bai)) nam co so viet nam ) OR ( cong trinh pham anh va cac cau ((do soi) OR (do son)) viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh cau danh ((va bac) OR (va bai)) nam co so viet nam ) or ( cong trinh pham anh va cac cau ((do soi) or (do son)) viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cau danh ((va bac) OR (va bai)) nam co so viet nam ) or ( cong trinh pham anh va cac cau ((do soi) or (do son)) viet nam ))*.