Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh dao » trinh do, trinh da, trinh dan
hoi viet » hai viet, oi viet, thai viet
cai cach » loi cach, tai cac, va cach
chao ban » chat ban, chao van, cho ban
hoc viet » hoc hien
cac cam » cad cam, cac cap, cac cau
cac cay » ca cay, cac cap, cac cau
van van » van ban, tan van, san van
cach co » cach con, cac co, cach noi
co hoi » co loi
van va » van vat, van ha, dan 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 chao ban va ((cac cay) OR (cac cam)) co hoi viet nam ) or ( chuong trinh dao ((van va) or (van van)) cai cach co hoc viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh chao ban va ((cac cay) OR (cac cam)) co hoi viet nam ) OR ( chuong trinh dao ((van va) OR (van van)) cai cach co hoc viet nam ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh chao ban va ((cac cay) OR (cac cam)) co hoi viet nam ) or ( chuong trinh dao ((van va) or (van van)) cai cach co hoc viet nam ))*".