Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh cao » trinh co, trinh cau, tinh cao
soi viet » so viet, hoi viet, oi viet
lanh va » hanh va, lanh dao, doanh va
cac tai » cao tai, cac bai, cac dai
cac cay » ca cay, cac cam, cac cap
lan van » luan van, lang van, tan van
anh va » hanh va
cam co » cac co, cay co, lam co
lan va » luan va, lang va, ban va
co soi » cot soi, co so, co hoi
nam co » nam cao, nam bo, nam so

You may be able to get more results by adjusting your search query.

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