Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, tinh cao
trinh cau » trinh chat, trinh chao, trinh tu
doi viet » dai viet, hoi viet, do viet
cau lanh » cau danh, cay lanh, dau lanh
mai viet » thi viet
lan van » luan van, lang van, tan van
oi viet » hoi viet, o viet, cuoi viet
cao cac » cho cac, cao cap, ca cac
lanh va » hanh va, anh va, lanh dao
van cao » van dao, van bao, van hao
cau van » chau van, cuu van, cac van
cao lan » cao van, cao dang, cao tang
co mai » co ma, co may, co dai
cac co » cac cong
cap co » tap co, cap do, cay co
va cao » va cac, va co, va dao
van va » van vat, van van, ban va

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