Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
xuc va » tuc va, luc va, xac va

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 y ((nang xa) OR (lang van)) hoi. hieu va cam ((xuc va) OR (duc va)) hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (lang van)) hoi. hieu va cam ((xuc va) OR (duc va)) hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (lang van)) hoi. hieu va cam ((xuc va) OR (duc va)) hanh lai cua tre*.