Perhaps you should try some spelling variations:
pham hanh » pham thanh, pham anh, pham hang
trinh cau » trinh chat, trinh chao, trinh tu
cham anh » pham anh, cham binh, cham tinh
soi viet » hoi viet, oi viet, doi viet
cau anh » cau danh, cau lanh, cuu anh
bac nam » bac am, ban nam, bau nam
so viet » hoc viet
cac cau » cac mau, bac cau, ca cau
anh va » hanh va
va bac » van bac, va bai, va bao
nam co » nam cao, nam bo, nam so
do soi » do moi, do son, do sai

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