Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
lai cuu » lai cua, lai chau, lai cuoc
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
nang xa » lang xa, nang ma, mang xa
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va
loc va » hoc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((nang xa) or (nang x)) hoi. hieu ve cau ((luc va) or (loc va)) hanh lai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang xa) OR (nang x)) hoi. hieu ve cau ((luc va) OR (loc va)) hanh lai cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (nang x)) hoi. hieu ve cau ((luc va) or (loc va)) hanh lai cuu tre*.