Perhaps you should try some spelling variations:
lieu nguoi » lieu nguon, dien nguoi, le nguoi
tay nguoi » toc nguoi
cach thuc » anh thuc, cac thu
dao nguoi » cho nguoi
cach duoc » sach duoc, cac nuoc, cach dung
duoc lieu » du lieu
cach hoc » cach thoi, dich hoc, cac hop
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 ((cach hoc) OR (cach thuc)) ((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 ((cach hoc) OR (cach thuc)) ((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 ((cach hoc) OR (cach thuc)) ((tay nguoi) or (dao nguoi)) ) or ( tu cach duoc lieu nguoi ))".
• Adding a wildcard symbol may retrieve word variants: (( tu ((cach hoc) OR (cach thuc)) ((tay nguoi) or (dao nguoi)) ) or ( tu cach duoc lieu nguoi ))*.