Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thanh le » thinh le, thanh ve, thanh de
tu sach » thu sach, su sach, te sach
ty lang » tay lang, ty xang, tu lang
ty hang » ly hang, ty xang, thi hang
nam tu » nam thu, nam thuc
tu ban » thu ban, te ban
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: tu sach ((ty lang) OR (ty hang)) ha noi. hieu van nam tu ban thanh le cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty lang) OR (ty hang)) ha noi. hieu van nam tu ban thanh le cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty lang) OR (ty hang)) ha noi. hieu van nam tu ban thanh le cua vat*.