Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ban hang » ngan hang
noi cua » hoi cua, doi cua, moi cua
nam duc » nam duoc, pham duc, nam thuc
va nam » van nam, ha nam, va nay
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ky nang o hoc. lieu va nam duc ((ban hanh) or (ban hang)) noi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang o hoc. lieu va nam duc ((ban hanh) OR (ban hang)) noi cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky nang o hoc. lieu va nam duc ((ban hanh) or (ban hang)) noi cua te*.