Perhaps you should try some spelling variations:
van thanh » ban thanh
toc sach » hoc sach, doc sach, thuoc sach
phan luc » nhan luc, phan duc, phan suc
van tuan » van quan, van ban, anh tuan
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va phan » van phan, va phat, va phap
te cua » tue cua, le cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky nang x hoi. hieu va phan luc ((van thanh) OR (van tuan)) te cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky nang x hoi. hieu va phan luc ((van thanh) OR (van tuan)) te cua vat~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang x hoi. hieu va phan luc ((van thanh) OR (van tuan)) te cua vat*.