Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
tang luan » dung luan
dang van » hoang van, hang va
thanh le » thinh le, thanh ve, thanh de
hieu van » thien van, lieu va, hieu ve
tu sach » thu sach, su sach, te sach
tuc ban » thuc ban, truc ban, tu ban
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
cam tuc » cam xuc, cam tu, nam thuc
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 ((dang van) or (tang luan)) hoi. ((hieu va) or (hieu van)) cam tuc ban thanh le cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((dang van) OR (tang luan)) hoi. ((hieu va) OR (hieu van)) cam tuc ban thanh le cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((dang van) or (tang luan)) hoi. ((hieu va) or (hieu van)) cam tuc ban thanh le cua vat*.