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
cong san » cong tac
cay cong » cac cong, cao cong, cau cong
soi viet » so viet, hoi viet, oi viet
san viet » gian viet, anh viet
cam tay » cam bay, cam day, nam tay
cau lan » cau lanh, sau lan, cau van
cua cay » cua cac
lan van » luan van, lang van, tan van
cao lan » cao van, cao dang, cao tang
co tay » so tay, co may, co ta
ca tay » ha tay, ca cay, ca tai
lan va » luan va, lanh va, lang va
va cua » va chua, via cua, ca cua
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 lan van ((((ca tay) or (co tay))) or (cam tay)) o soi viet nam ) or ( chuong trinh cau lan va cua cay cong san viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao lan van ((((ca tay) OR (co tay))) OR (cam tay)) o soi viet nam ) OR ( chuong trinh cau lan va cua cay cong san viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao lan van ((((ca tay) or (co tay))) or (cam tay)) o soi viet nam ) or ( chuong trinh cau lan va cua cay cong san viet nam ))*.