Perhaps you should try some spelling variations:
lieu nguoi » lieu nguon, dien nguoi, le nguoi
dao nguoi » cho nguoi
tay nguoi » toc nguoi
quoc lieu » duoc lieu, quoc sieu, quoc viet
mach hoc » cach hoc, dich hoc, anh hoc
cac quoc » cac nuoc, cac cuoc, cao quoc
tu mach » tu cach, tu manh, tu hach

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

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