Perhaps you should try some spelling variations:
mac nguoi » ma nguoi, tac nguoi, mat nguoi
may nguoi » ma nguoi, lay nguoi, mat nguoi
tay nguoi » toc nguoi, dao nguoi
cach hoc » cach thuc, cach thoi, dich hoc
sach toc » bach tuoc, sach duoc, sach nuoc
hoc may » hoc ma
cac hoc » cac hop, bac hoc, cac toc
hoc mac » hoc ma, hoc cac
vu sach » vu bach, su sach, vu khach
toc tay » toc thai

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 may nguoi ) or ( tu cac hoc mac nguoi ))) or ( vu sach toc tay nguoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( tu cach hoc may nguoi ) OR ( tu cac hoc mac nguoi ))) OR ( vu sach toc tay nguoi )).
• Adding a wildcard symbol may retrieve word variants: (((( tu cach hoc may nguoi ) or ( tu cac hoc mac nguoi ))) or ( vu sach toc tay nguoi ))*.