Perhaps you should try some spelling variations:
lieu nguoi » lieu nguon, dien nguoi, le nguoi
tay nguoi » toc nguoi
dao nguoi » cho nguoi
cach duoc » sach duoc, cac nuoc, cach dung
duoc lieu » du lieu
mach hoc » dich hoc, anh hoc, bac hoc
cach hoc » cach thuc, cach thoi, dich hoc
tu cach » tu cac

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) OR (cach hoc)) ((tay nguoi) or (dao nguoi)) ) or ( tu cach duoc lieu nguoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu ((mach hoc) OR (cach hoc)) ((tay nguoi) OR (dao nguoi)) ) OR ( tu cach duoc lieu nguoi ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu ((mach hoc) OR (cach hoc)) ((tay nguoi) or (dao nguoi)) ) or ( tu cach duoc lieu nguoi ))*".