Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
xuc van » duc van, luc van, vuc van
lai cua » hai cua, lai chau, thai cua
va nam » van nam, va nay
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 ly nang x hoi. hieu ((va nam) OR (ha nam)) xuc van hanh ((lai cua) OR (dai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang x hoi. hieu ((va nam) OR (ha nam)) xuc van hanh ((lai cua) or (dai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang x hoi. hieu ((va nam) OR (ha nam)) xuc van hanh ((lai cua) or (dai cua)) tre*.