Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chat » tinh chat, trinh luat, trinh han
trinh cao » trinh chao, trinh co, tinh cao
trinh cau » trinh chao, trinh tu, trinh han
chat ban » nhat ban, chat ran, cua ban
hoi viet » hai viet, thai viet, cuoi viet
van cac » van hac, van cau, van bac
lan van » luan van, lang van, tan van
cao lan » cao van, cao dang, cao tang
oi viet » o viet, cuoi viet, gioi viet
so viet » hoc viet
cau van » chau van, cuu van, cac van
ban vat » bang vat, ben vat, ban va
van va » van vat, van van, ban va
co hoi » co hoc, co loi
cay co » tay co, cay cong
ca cay » cua cay, cac cay, ca cac
vat ca » vat cua, vat va, vat co
cam co » nam co, lam co, cam lo
cac co » cac cong
co oi » co loi, co doi, co toi
va ca » va cac, va cao, va cai

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 chat ban vat ca cay co hoi viet nam ) or ( chuong trinh cau van va ca cay co oi viet nam ))) or ( chuong trinh cao lan van cac ((cam co) OR (cac co)) so viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( chuong trinh chat ban vat ca cay co hoi viet nam ) OR ( chuong trinh cau van va ca cay co oi viet nam ))) OR ( chuong trinh cao lan van cac ((cam co) OR (cac co)) so viet nam ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( chuong trinh chat ban vat ca cay co hoi viet nam ) or ( chuong trinh cau van va ca cay co oi viet nam ))) or ( chuong trinh cao lan van cac ((cam co) OR (cac co)) so viet nam ))*".