Perhaps you should try some spelling variations:
chuong tranh » chuong trinh, huong tran, phuong trinh
khao doanh » khao danh, cho doanh, nhap doanh
tranh chap » tranh cua, trinh chat
trinh khao » trinh chao, trinh khai, trinh kham
chap hanh » nhat hanh, phap han, pham hanh
doanh va » doan va, doanh tai, doanh cua
khao anh » khao danh, khao nhanh, khac manh
oi viet » hoi viet, o viet, cuoi viet
cot soi » cot loi, cong soi
cac cap » cao cap, cac cau, cac cay
cac cam » cac cau, cac cay, cac ham
hanh va » hang va, hanh vi
cac nam » bac nam, cac ham, cai nam
va cad » va cao, va cai, va cau
co soi » co so, co hoi, co loi
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 tranh chap hanh va cad cam ((co soi) OR (cot soi)) viet nam ) or ((( cong trinh khao anh va cac nam ((co soi) OR (cot 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 tranh chap hanh va cad cam ((co soi) OR (cot soi)) viet nam ) OR ((( cong trinh khao anh va cac nam ((co soi) OR (cot 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 tranh chap hanh va cad cam ((co soi) OR (cot soi)) viet nam ) or ((( cong trinh khao anh va cac nam ((co soi) OR (cot soi)) viet nam ) or ( cong trinh khao doanh va ((cac cam) or (cac cap)) co oi viet nam ))))*".