Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cau » trinh chat, trinh chao, trinh tu
trinh sau » trinh san, trinh su, trinh mau
sau lang » sau lan, sau tang, va lang
cac cong » cua cong
cay cong » cao cong, cau cong, cay trong
lang van » dang van, tang van, hoang van
hoi viet » hai viet, thai viet, cuoi viet
sau luan » su luan, dau luan, sau lan
chat co » thuat co, chat cua, chat deo
oi viet » o viet, cuoi viet, gioi viet
cau lan » cau lanh, cao lan, sau lan
van cao » van dao, van bao, van hao
co hoi » co hoc, co loi
cap co » cap cho, tap co, cap do
lan va » luan va, lanh va, lan van
va cao » va cac, va co, va dao
co oi » co loi, co doi, co toi

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