Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, trinh cau
soi viet » so viet, hoi viet, oi viet
cong hoa » dong hoa, dong hoc, hang hoa
tan van » tran van, tang van, luan van
cau lan » cau lanh, cao lan, sau lan
cam day » cam bay, cam tay
nam tay » nam tai, nom tay, nam tan
cau van » chau van, cuu van, cac van
cao tan » cao tang, cao tai, cao van
ca cua » co cua
ca tay » cam tay, ca cay, ca tai
va ca » va cac, va cao, va cai
o soi » mo soi, o suoi, o hoi

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 cao tan van ((((ca tay) or (ha tay))) or (((cam day) or (nam tay)))) o soi viet nam ) or ( chuong trinh ((cau lan) or (cau van)) va ca cua cong hoa viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao tan van ((((ca tay) OR (ha tay))) OR (((cam day) OR (nam tay)))) o soi viet nam ) OR ( chuong trinh ((cau lan) OR (cau van)) va ca cua cong hoa viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao tan van ((((ca tay) or (ha tay))) or (((cam day) or (nam tay)))) o soi viet nam ) or ( chuong trinh ((cau lan) or (cau van)) va ca cua cong hoa viet nam ))*.