Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cau » trinh chat, trinh chao, trinh tu
cuoi viet » nguoi viet, co viet, cua viet
nuoc viet » ngoc viet, hoc viet, toc viet
hoi viet » hai viet, oi viet, thai viet
cau lanh » cau danh, cay lanh, dau lanh
cao cay » cao cap, cho cay, tao cay
lan van » luan van, lang van, tan van
lanh va » hanh va, anh va, lanh dao
cao tay » cao tai, dao tay, bao tay
cay co » cac co, tay co, cay cong
co hoi » co hoc, co loi
lan va » luan va, lang va, ban va
va cao » va cac, va co, va dao
tay o » tay co

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 cau ((lan va) or (lan van)) cao cay co hoi viet nam ) or ( chuong trinh cau lanh va cao cay co hoi viet nam ))) or ( chuong trinh cau ((lan va) or (lan van)) cao tay o ((cuoi viet) or (nuoc viet)) nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( chuong trinh cau ((lan va) OR (lan van)) cao cay co hoi viet nam ) OR ( chuong trinh cau lanh va cao cay co hoi viet nam ))) OR ( chuong trinh cau ((lan va) OR (lan van)) cao tay o ((cuoi viet) OR (nuoc viet)) nam )).
• Adding a wildcard symbol may retrieve word variants: (((( chuong trinh cau ((lan va) or (lan van)) cao cay co hoi viet nam ) or ( chuong trinh cau lanh va cao cay co hoi viet nam ))) or ( chuong trinh cau ((lan va) or (lan van)) cao tay o ((cuoi viet) or (nuoc viet)) nam ))*.