Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
tu sach » thu sach, su sach, te sach
hanh va » hang va
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
cac vo » cac co, cac vi, cac bo

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 (nuoc sach)) ky lang xa hoi. hieu ve cac vo van ((hanh va) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (nuoc sach)) ky lang xa hoi. hieu ve cac vo van ((hanh va) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (nuoc sach)) ky lang xa hoi. hieu ve cac vo van ((hanh va) or (hanh vi)) cua tre*.