Perhaps you should try some spelling variations:
thai nguoi » thanh nguoi, thang nguoi, thuat nguoi
phai nguoi » phau nguoi, loai nguoi, nhan nguoi
tay nguoi » toc nguoi, dao nguoi
cach toc » cac toc, cach hoc, cach thuc
nuoc tay » nuoc tai, nuoc ta, nguoi tay
tu cach » tu cac
tu hoc » te hoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach toc ((thai nguoi) OR (phai nguoi)) ) OR ( tu hoc nuoc tay nguoi ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu cach toc ((thai nguoi) OR (phai nguoi)) ) or ( tu hoc nuoc tay nguoi ))~".
• Adding a wildcard symbol may retrieve word variants: (( tu cach toc ((thai nguoi) OR (phai nguoi)) ) or ( tu hoc nuoc tay nguoi ))*.