Perhaps you should try some spelling variations:
trinh cao » trinh chao, trinh cau, tinh cao
trinh do » trinh ky
dang vat » dang van, dong vat, dang nhat
soi viet » hoi viet, oi viet, doi viet
cong soi » cong so, cong goi, cong noi
cay cong » cac cong, cao cong, cau cong
trinh co » trinh cong, trinh hoa, trinh ky
cac cay » ca cay, cac cam, cac cap
so viet » hoc viet
lanh va » hanh va, anh va, lanh dao
do lanh » do sanh, do danh, do anh
vat cac » vat cach, sat cac, tat cac
cac cau » cac mau, bac cau, ca cau
cac co » cac cong
ca cac » cua cac
cau lo » cau do, cau o, cam lo
lo soi » lo so, mo soi
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 do lanh va ca cac co so viet nam ) or ((( cong trinh co ban va cac cay cong soi viet nam ) or ( chuong trinh cao dang vat cac cau lo soi viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh do lanh va ca cac co so viet nam ) OR ((( cong trinh co ban va cac cay cong soi viet nam ) OR ( chuong trinh cao dang vat cac cau lo soi viet nam )))).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh do lanh va ca cac co so viet nam ) or ((( cong trinh co ban va cac cay cong soi viet nam ) or ( chuong trinh cao dang vat cac cau lo soi viet nam ))))*.