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, doi viet
sau lanh » sau lan, cau lanh, dau lanh
loi viet » loai viet, hoi viet, doi viet
oi viet » hoi viet, o viet, cuoi viet
cac cap » cao cap, cac cam, cac cau
luan va » luan van, luat va
lanh va » hanh va, anh va, lanh dao
cac cay » ca cay, cac cam, cac cau
cap co » cap cho, tap co, cap do
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 cac cap co ((soi viet) OR (oi viet)) nam ) or ( cong trinh sau lanh va cac 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) OR (oi viet)) nam ) OR ( cong trinh sau lanh va cac cay co loi viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh chao luan va cac cap co ((soi viet) OR (oi viet)) nam ) or ( cong trinh sau lanh va cac cay co loi viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh chao luan va cac cap co ((soi viet) OR (oi viet)) nam ) or ( cong trinh sau lanh va cac cay co loi viet nam ))*.