Perhaps you should try some spelling variations:
doanh quoc » doan quoc, doanh cuoc, doanh duoc
giap nguoi » gian nguoi, gap nguoi, giau nguoi
tap nguoi » tay nguoi, gap nguoi, tang nguoi
tac nguoi » toc nguoi, tay nguoi, thuc nguoi
dao nguoi » cho nguoi
mach hoc » cach hoc, dich hoc, anh hoc
tu doanh » su doanh, te doanh, ty doanh
quoc dao » quoc bao, duoc dao, quoc cao
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 ((((tap nguoi) or (giap nguoi))) or (tac nguoi)) ) or ( tu doanh quoc dao nguoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu mach hoc ((((tap nguoi) OR (giap nguoi))) OR (tac nguoi)) ) OR ( tu doanh quoc dao nguoi )).
• Adding a wildcard symbol may retrieve word variants: (( tu mach hoc ((((tap nguoi) or (giap nguoi))) or (tac nguoi)) ) or ( tu doanh quoc dao nguoi ))*.