Perhaps you should try some spelling variations:
xa trong » xa truong, ca trong, va trong
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
tu xa » tu xay, tu va, te xa

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

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