Perhaps you should try some spelling variations:
trinh khao » trinh chao, trinh khai, trinh kham
khao doanh » cho doanh, nhap doanh, cao doanh
khao danh » cao danh, han danh, khau dan
chap hanh » nhat hanh, pham hanh, phat hanh
phap han » phap hoan, phap phan, phap nang
doanh va » doan va, doanh tai, doanh cua
soi viet » so viet, hoi viet, doi viet
cac nam » bac nam, cac ham, cai nam
cac cap » cao cap, cac cau, cac cay
cac cam » cac cau, cac cay, cac ham
oi viet » hoi viet, o viet, cuoi viet
danh va » hanh va, anh va, dan va
co soi » cot soi, co so, co hoi
cam co » cac co, cay co, lam co
va cad » va cao, va cai, va cau
nam co » nam cao, nam bo, nam so
co oi » co hoi, co loi, co doi

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