Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
lo van » vo van, so van, do van
anh va » hanh va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (cuoc cach)) ky lang xa hoi. hieu ve cac ((lo van) or (le van)) anh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (cuoc cach)) ky lang xa hoi. hieu ve cac ((lo van) OR (le van)) anh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (cuoc cach)) ky lang xa hoi. hieu ve cac ((lo van) or (le van)) anh va cua tre*.