Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh co, trinh cau
trinh sau » trinh san, trinh cau, trinh su
cao cong » cac cong, cao dang, cua cong
cay cong » cac cong, cau cong, cay trong
soi viet » so viet, hoi viet, oi viet
san viet » gian viet, anh viet
cam tay » cam bay, cam day, nam tay
cao lan » cao van, cao dang, cao tang
lan van » luan van, lang van, tan van
sau lan » dau luan
lan va » luan va, lanh va, lang va
va cua » va chua, via cua, ca cua
ca tay » ha tay, ca cay, ca tai
co tay » so tay, co may, co ta
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 sau lan va cua ((cay cong) or (cao 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 sau lan va cua ((cay cong) OR (cao 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 sau lan va cua ((cay cong) or (cao cong)) san viet nam ))*.