Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh sau » trinh san, trinh cau, trinh su
trinh cao » trinh chao, trinh cau, tinh cao
thai viet » thi viet, tai viet, mai viet
hoi viet » hai viet, oi viet, cuoi viet
trinh co » trinh do, trinh cong, trinh hoa
doi viet » dai viet, oi viet, do viet
lan van » luan van, lang van, tan van
cac cap » cao cap, cac cam, cac cau
sau lan » dau luan
cao lan » cao van, cao dang, cao tang
cac tay » cac tac, cac tai, cac tap
van cac » van hac, van cau, van bac
cac cay » ca cay, cac cam, cac cau
co lan » co ban, co dan, co lao
cay co » cac co, cay cong
tay co » ty co, tay o
lan va » luan va, lanh va, lang va
cap co » cap cho, tap co, cap do
co doi » cho doi, co dot, co dai

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 lan van cac cay co ((hoi viet) OR (thai viet)) nam ) or ( chuong trinh co lan van cac tay co ((hoi viet) OR (thai viet)) nam ))) or ( chuong trinh sau lan va cac cap co doi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( chuong trinh cao lan van cac cay co ((hoi viet) OR (thai viet)) nam ) OR ( chuong trinh co lan van cac tay co ((hoi viet) OR (thai viet)) nam ))) OR ( chuong trinh sau lan va cac cap co doi viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( chuong trinh cao lan van cac cay co ((hoi viet) OR (thai viet)) nam ) or ( chuong trinh co lan van cac tay co ((hoi viet) OR (thai viet)) nam ))) or ( chuong trinh sau lan va cac cap co doi viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (((( chuong trinh cao lan van cac cay co ((hoi viet) OR (thai viet)) nam ) or ( chuong trinh co lan van cac tay co ((hoi viet) OR (thai viet)) nam ))) or ( chuong trinh sau lan va cac cap co doi viet nam ))*.