Perhaps you should try some spelling variations:
trinh cham » trinh chat, trinh chao, trinh han
trinh cau » trinh chat, trinh chao, trinh tu
soi viet » hoi viet, oi viet, doi viet
cham anh » pham anh, pham hanh, cham binh
cam con » cam chan, dam cong, cach con
cot loi » co loi, mot loai
cot soi » cong soi
so viet » hoc viet
cau anh » cau danh, cau lanh, cuu anh
cac cam » cac cap, cac cau, cac cay
co soi » co so, co hoi, co loi
cam co » cac co, nam co, cay co
anh va » hanh va
con so » cong so, hon so, con bo
va cad » va cao, va cai, va cau

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