Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
thanh le » thinh le, thanh ve, thanh de
truc ban » thuc ban, truc dan, truc van
lang van » dang van, tang van, hoang van
sach phu » sach thu, sach phat, sach thue
qua hai » qua hoat
qua cac » cua cac
lang xa » lang ha, dang xay
le cua » ly 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 phu ((lang xa) OR (lang van)) hoi. hieu ((qua cac) or (qua hai)) truc ban thanh le cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach phu ((lang xa) OR (lang van)) hoi. hieu ((qua cac) OR (qua hai)) truc ban thanh le cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach phu ((lang xa) OR (lang van)) hoi. hieu ((qua cac) or (qua hai)) truc ban thanh le cua vat".
• Adding a wildcard symbol may retrieve word variants: thu sach phu ((lang xa) OR (lang van)) hoi. hieu ((qua cac) or (qua hai)) truc ban thanh le cua vat*.