Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hang hoi » hang hoa, hang hai, hang doi
hoi cua » hoi chuc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
xac va » tac va, ac va, bac 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 ty ((nang xa) or (lang xa)) hoi. hieu ve cac ((xac va) or (duc va)) hang hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang xa) OR (lang xa)) hoi. hieu ve cac ((xac va) OR (duc va)) hang hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang xa) or (lang xa)) hoi. hieu ve cac ((xac va) or (duc va)) hang hoi cua tre*.