Perhaps you should try some spelling variations:
chuong tinh » khuong tinh, thuong tinh, phuong trinh
scuoi viet » cuoi viet, nguoi viet, cuoi viec
trinh quan » tinh quang, trinh luat, trinh han
cuoc viet » nuoc viet, cuoi viet, quoc viet
trinh do » trinh ky
cua doan » cua doanh, cua dan, cua toan
tinh cua » trinh cua, sinh cua, tinh chat
co scuoi » co nguoi, co nuoi
quan dan » quan doan, quan den, quan van
dot viet » dat viet, do viet, doc viet
cac cap » cao cap, cac cam, cac cau
cay mot » cay mo, cay moc, tay mot
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
cay ot » cay o
nam co » nam cao, nam bo, nam so

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