Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh cao » trinh chao, trinh cau, tinh cao
soi viet » hoi viet, oi viet, doi viet
trinh co » trinh do, trinh cong, trinh hoa
loi viet » loai viet, hoi viet, oi viet
so viet » hoc viet
lan van » luan van, lang van, tan van
cao lan » cao van, cao dang, cao tang
cua cay » cua cac
van van » tan van, san van, van vat
cac cay » cac cam, cac cap, cac cau
co lan » co ban, co dan, co lao
lan va » luan va, lanh va, lang va
cay co » cac co, tay co, cay cong
cao co » cao cho, cac co, co co
ca cao » ca dao, cu cao, ca cac
van ca » van cau, van cua, dan ca
ca cay » ca cac, va cay, ca cau
co loi » co hoi
co soi » cot soi, co hoi, co doi
va ca » va cao, va cai, va cau

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