Perhaps you should try some spelling variations:
trinh chap » trinh chat, tranh chap, trinh chao
khao doanh » cho doanh, nhap doanh, cao doanh
trinh khao » trinh chao, trinh khai, trinh kham
chap hanh » nhat hanh, phap han, pham hanh
khao danh » cao danh, han danh, khau dan
hoi viet » hai viet, thai viet, cuoi viet
cac nam » bac nam, cac cam, cac ham
danh va » doanh va, anh va, dan va
hanh va » hang va, hanh vi
oi viet » o viet, cuoi viet, gioi viet
co hoi » co hoc, co loi
nam so » nam sao, nam bo
so hoi » so hoa, so hoc, o hoi
cam co » cac co, nam co, cay co
va cad » va cao, va cai, va cau
cap co » cap cho, tap co, cap do
co oi » co loi, co doi, co toi

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 chap hanh va cad cam co hoi viet nam ) or ((( cong trinh khao danh va cac nam so hoi viet nam ) or ( cong trinh khao doanh ((tai cac) OR (tai cuc)) cap co oi viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh chap hanh va cad cam co hoi viet nam ) OR ((( cong trinh khao danh va cac nam so hoi viet nam ) OR ( cong trinh khao doanh ((tai cac) OR (tai cuc)) cap co oi viet nam ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh chap hanh va cad cam co hoi viet nam ) or ((( cong trinh khao danh va cac nam so hoi viet nam ) or ( cong trinh khao doanh ((tai cac) OR (tai cuc)) cap co oi viet nam ))))*".