Perhaps you should try some spelling variations:
trinh chao » trinh chat, trinh han, trinh co
chao luan » khao luan, phap luan, khau luan
trinh sau » trinh san, trinh cau, trinh su
soi viet » so viet, hoi viet, oi viet
caic cap » cac cap, cao cap, cac cam
loi viet » loai viet, hoi viet, oi viet
cap cot » cac cot
cot soi » cot loi, cong soi
va caic » va cac
luan va » luan van, luat va
sau lan » dau luan
cai cay » ca cay, cac cay, cai cach
lan va » lanh va, lan van, lang va
va cai » va cac, va bai, va dai
cay co » cac co, tay co, cay cong
co loi » co hoi

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 chao luan va caic cap cot soi viet nam ) or ( cong trinh sau lan va cai cay co loi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh chao luan va caic cap cot soi viet nam ) OR ( cong trinh sau lan va cai cay co loi viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh chao luan va caic cap cot soi viet nam ) or ( cong trinh sau lan va cai cay co loi viet nam ))*.