Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chat » tinh chat, trinh luat, trinh han
nuoc viet » ngoc viet, toc viet
trinh cao » trinh chao, trinh co, trinh cau
cao bang » cao dang, cao tang, cao nang
hoi viet » hai viet, oi viet, thai viet
luong va » dung va
hoc viet » hoc hien
co nuoc » cho nuoc, co duoc, co nuoi
cac cam » cad cam, cac cau, cac ham
bang va » hang va, ban va, trang va
cac cay » ca cay, cac cau, tac cay
cac cap » cao cap, cac cau, cac tap
luat va » xuat va, luat ve, luan va
suat va » xuat va
cay co » cac co, tay co, cay cong
co hoi » co loi

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 cao bang va ((cac cap) or (cac cam)) co nuoc viet nam ) or ((( chuong trinh chat luong va cac cay co hoi viet nam ) or ( chuong trinh chat ((luat va) or (suat va)) cac cay co hoc viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao bang va ((cac cap) OR (cac cam)) co nuoc viet nam ) OR ((( chuong trinh chat luong va cac cay co hoi viet nam ) OR ( chuong trinh chat ((luat va) OR (suat va)) cac cay co hoc viet nam )))).
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao bang va ((cac cap) or (cac cam)) co nuoc viet nam ) or ((( chuong trinh chat luong va cac cay co hoi viet nam ) or ( chuong trinh chat ((luat va) or (suat va)) cac cay co hoc viet nam ))))*.