Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh sau » trinh san, trinh su, trinh mau
trinh cau » trinh chat, trinh chao, trinh tu
tran van » luan van
cau luan » cu luan, dau luan, lau luan
loi viet » loai viet, oi viet, doi viet
hoi viet » hai viet, oi viet, thai viet
cau lanh » cau danh, cay lanh, dau lanh
cong ha » cong hoa, dong ha, cong tac
dao cua » dai cua, day cua, dan cua
luan va » luan van, luat va
do viet » dao viet, so viet, o viet
cau lan » cao lan, sau lan, cau van
lanh va » hanh va, anh va, lanh dao
cao cap » cao chat
tan van » tang van, luan van, dang van
ha viet » hoa viet, hai viet, han viet
va cao » va cac, va co, va bao
cap co » cap cho, tap co, cac co
co loi » co hoi
do hoi » do choi, do hoai, do thoi
cap do » cau do
lan va » lan van, lang va, ban va
va dao » ca dao
co do » co dot, co don, co so

You may be able to get more results by adjusting your search query.

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