Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh cau » trinh chat, trinh tu, trinh han
chao tan » chao van, cao tan, chao yang
soi viet » hoi viet, oi viet, doi viet
cac cong » cua cong
cay cong » cao cong, cau cong, cay trong
cau lan » cau lanh, cao lan, sau lan
so viet » hoc viet
dan cua » dan ca, ban cua, dai cua
van cua » vang cua, ban cua, nan cua
cay co » cac co, tay co
lan va » luan va, lanh va, lan van
va cao » va cac, va co, va dao
va ca » va cac, va cai, va cau

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