Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
pham duy » pham duc
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
duy va » duy vat, duy van, day 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 ky) OR (sach y)) nang xa hoi. ((hieu ve) OR (hieu va)) pham duy va hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang xa hoi. ((hieu ve) or (hieu va)) pham duy va hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang xa hoi. ((hieu ve) or (hieu va)) pham duy va hanh lai cua tre*.