Perhaps you should try some spelling variations:
dao nguoi » cho nguoi
tay nguoi » toc nguoi
sach moi » sach doi, sach hoi, bach mai
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoc gian » hoc giao, hoc giai, hoc gia
tu sach » thu sach, su sach, te sach
co dich » co tich, co dinh, chu dich

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach moi ((tay nguoi) or (dao nguoi)) ) or ( co dich hoc gian nguoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach moi ((tay nguoi) OR (dao nguoi)) ) OR ( co dich hoc gian nguoi )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach moi ((tay nguoi) or (dao nguoi)) ) or ( co dich hoc gian nguoi ))*.