Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (so sach)) ky nang x hoi. hieu va cao ((xuc va) or (tuc va)) thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ky nang x hoi. hieu va cao ((xuc va) OR (tuc va)) thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky nang x hoi. hieu va cao ((xuc va) or (tuc va)) thanh di cua tre*.