Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chat » tinh chat, trinh luat, trinh han
trinh cao » trinh chao, trinh co, trinh cau
cao lanh » cao lan, cao anh, cao danh
trinh tu » trinh ky, trinh do
lanh va » hanh va, anh va, lanh dao
cac cam » cad cam, cac cay, cac ham
cac cap » cao cap, cac cay, cac tap
cac cau » cac mau, bac cau, ca cau
lan va » luan va, lan van, lang va
co soi » cot soi, co hoi, co loi

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 cao lanh va ((cac cam) or (cac cau)) ((co soi) or (co so)) viet nam ) or ( chuong ((trinh tu) or (trinh chat)) lan va cac cap ((co soi) or (co so)) viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao lanh va ((cac cam) OR (cac cau)) ((co soi) OR (co so)) viet nam ) OR ( chuong ((trinh tu) OR (trinh chat)) lan va cac cap ((co soi) OR (co so)) viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao lanh va ((cac cam) or (cac cau)) ((co soi) or (co so)) viet nam ) or ( chuong ((trinh tu) or (trinh chat)) lan va cac cap ((co soi) or (co so)) viet nam ))*.