Perhaps you should try some spelling variations:
khang loi » thang loi, hang loi, thanh loi
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
van cam » van nam, van lam, van cau
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
cuu tre » cua tre, cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((mang xa) OR (lang xa)) hoi. hieu van cam luc van ((khang loi) OR (khang voi)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((mang xa) or (lang xa)) hoi. hieu van cam luc van ((khang loi) OR (khang voi)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((mang xa) or (lang xa)) hoi. hieu van cam luc van ((khang loi) OR (khang voi)) cuu tre*.