Perhaps you should try some spelling variations:
chuong tinh » chuong trinh, khuong tinh, thuong tinh
chuan doan » chan doan
tinh chuan » trinh chuan, tinh chua, tieu chuan
cuoc viet » nuoc viet, cuoi viet, quoc viet
trinh cua » trinh luat, trinh quan, trinh luan
trinh do » trinh ky
tinh cua » sinh cua, tinh chat, tranh cua
co nguoi » cho nguoi, con nguoi, o nguoi
dai viet » mai viet, dao viet, tai viet
mot cuoc » soat cuoc, mot goc, doc cuoc
cac cap » cao cap, cac cam, cac cau
cay mot » cay mo, cay moc, cay ot
cac cay » ca cay, cac cam, cac cau
cac nam » bac nam, cac cam, cac ham
do ban » doi ban, co ban, do ben
dan va » dan ca, han va, doan van
cap co » cap cho, tap co, cap do
nam co » nam cao, nam bo, nam so
co dai » co dan, do dai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( cong trinh do ban va cac cay mot cuoc viet nam ) or ((( chuong ((trinh cua) OR (tinh cua)) dan va cac cap co nguoi viet nam ) or ( chuong tinh chuan doan va cac nam co dai viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh do ban va cac cay mot cuoc viet nam ) OR ((( chuong ((trinh cua) OR (tinh cua)) dan va cac cap co nguoi viet nam ) OR ( chuong tinh chuan doan va cac nam co dai viet nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cong trinh do ban va cac cay mot cuoc viet nam ) or ((( chuong ((trinh cua) OR (tinh cua)) dan va cac cap co nguoi viet nam ) or ( chuong tinh chuan doan va cac nam co dai viet nam ))))".
• Adding a wildcard symbol may retrieve word variants: (( cong trinh do ban va cac cay mot cuoc viet nam ) or ((( chuong ((trinh cua) OR (tinh cua)) dan va cac cap co nguoi viet nam ) or ( chuong tinh chuan doan va cac nam co dai viet nam ))))*.