Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hang di » hang doi, hang vi, hang dien
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va
di cua » dai cua, doi cua, de cua

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 ma) or (lang xa)) hoi. hieu ve cac ((xuc va) or (duc va)) hang di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang ma) OR (lang xa)) hoi. hieu ve cac ((xuc va) OR (duc va)) hang di cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang ma) or (lang xa)) hoi. hieu ve cac ((xuc va) or (duc va)) hang di cua tre*.