Perhaps you should try some spelling variations:
trinh chat » tinh chat, trinh luat, trinh han
trinh cham » trinh chao, trinh han, trinh phan
cham binh » cham tinh, pham binh, thai binh
chat anh » nhat anh, nhat hanh, phat hanh
binh va » tinh va, sinh va, benh va
so viet » hoc viet
cac cam » cad cam, cac cap, cac cau
bac nam » bac am, ban nam, bau nam
cac nam » cac ham, cai nam, cuc nam
oi viet » hoi viet, o viet, cuoi viet
anh va » hanh va
cau co » cau do, cay co, dau co
cac co » cac cong

You may be able to get more results by adjusting your search query.

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