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
loi viet » loai viet, hoi viet, oi viet
luan va » luan van, luat va
cac cap » cao cap, cac cam, cac cau
sau lan » dau luan
cap co » cap cho, tap co, cap do
co soi » cot soi, co so, co hoi
lan va » lanh va, lan van, lang va
ca cay » cua cay, cac cay, ca cac
cay co » cac co, tay co, cay cong
co loi » co hoi
va ca » 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 chao luan va cac cap co soi viet nam ) or ( cong trinh sau lan va ca cay co loi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh chao luan va cac cap co soi viet nam ) OR ( cong trinh sau lan va ca cay co loi viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh chao luan va cac cap co soi viet nam ) or ( cong trinh sau lan va ca cay co loi viet nam ))*.