Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chat » tinh chat, trinh luat, trinh han
trinh chao » trinh han, trinh co, trinh giao
chat dan » chat ban, chat ran, hat dan
hoi viet » hai viet, thai viet, cuoi viet
loi viet » loai viet, doi viet, noi viet
chao dan » chao van, hao dan, khao danh
trinh tu » trinh ky, trinh do
soi viet » so viet, doi viet, noi viet
cac bac » cac bai, cac ban, cac cach
danh va » doanh va, hanh va, anh va
tu danh » te danh, tu hanh, tu manh
oi viet » o viet, cuoi viet, gioi viet
cac cot » cac cong, cac chat, cac hoat
cac cay » ca cay, cac cam, cac cap
cac co » cac cong
co loi » co hoi
cay co » tay co, cay cong
bac co » bac cao, bac bo, bac ho
dan va » doan va, dan ca, ban va

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 chat dan va cac cay co loi viet nam ) OR ((( chuong trinh chao dan va cac ((cac cot) OR (cac co)) soi viet nam ) OR ( chuong trinh tu danh va cac bac co ((hoi viet) OR (oi viet)) nam ))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh chat dan va cac cay co loi viet nam ) or ((( chuong trinh chao dan va cac ((cac cot) OR (cac co)) soi viet nam ) or ( chuong trinh tu danh va cac bac co ((hoi viet) or (oi viet)) nam ))))~".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh chat dan va cac cay co loi viet nam ) or ((( chuong trinh chao dan va cac ((cac cot) OR (cac co)) soi viet nam ) or ( chuong trinh tu danh va cac bac co ((hoi viet) or (oi viet)) nam ))))*.