Perhaps you should try some spelling variations:
dang nguoi » dung nguoi, nang nguoi, tang nguoi
dao nguoi » cho nguoi
mach hoc » cach hoc, dich hoc, anh hoc
sach moi » sach doi, sach hoi, bach mai
moi dang » hoi dang, moi dan, moi sang
hoc dao » hoc dan, hoc cao, hoc dai
vu sach » vu bach, su sach, vu khach
tim » time

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

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