Perhaps you should try some spelling variations:
ngay luc » nhan luc, nay lua, ngay doc
so sach » so sanh, bo sach, co sach
xang xa » lang xa, mang xa, ang xa
ca doan » ca dan, chan doan, cac doanh
doan vi » doan va, don vi, doan thi
cua tre » cuu tre, cua triet, dua tren
y xang » ty xang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y xang xa hoi. lieu va ((ngay luc) or (ngap lut)) ca doan vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y xang xa hoi. lieu va ((ngay luc) OR (ngap lut)) ca doan vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: so sach y xang xa hoi. lieu va ((ngay luc) or (ngap lut)) ca doan vi ((cua tre) or (cua te))*.