Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
sach tay » xach tay, sach hay, sach nay
lang van » dang van, tang van, hoang van
thuc ban » thuoc ban, thuc dan, thu ban
thanh ve » hanh ve, thanh va, thanh vien
lang xa » lang ha, dang xay
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
ve cua » le cua, de cua, te cua

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: thu sach tay ((lang xa) OR (lang van)) hoi. hieu ve tham thuc ban thanh ve cua vat~.
• Adding a wildcard symbol may retrieve word variants: thu sach tay ((lang xa) or (lang van)) hoi. hieu ve tham thuc ban thanh ve cua vat*.