Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
tan thanh » tang thanh, toan thanh, ban thanh
thu sach » tu sach, thuat sach, thuoc sach
hieu voi » hieu moi, lieu voi, hieu loi
voi pham » vi pham, toi pham, loai pham
co sach » bo sach, cuon sach, hoc sach
lai cua » dai cua, hai cua, lai chau
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: ((thu sach) or (co sach)) ky nang o hoc. hieu voi pham duc ((tan thanh) or (tran thanh)) lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (co sach)) ky nang o hoc. hieu voi pham duc ((tan thanh) OR (tran thanh)) lai cua te.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (co sach)) ky nang o hoc. hieu voi pham duc ((tan thanh) or (tran thanh)) lai cua te*.