Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
dang van » hoang van, hang va
tang van » hoang van, trong van, tang luan
thanh le » thinh le, thanh ve, thanh de
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
tuc ban » thuc ban, truc ban, tu ban
ve cam » ve cham, ve cac, va cam
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 van)) hoi. hieu ve 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 van)) hoi. hieu ve cam tuc ban thanh le cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((dang van) or (tang van)) hoi. hieu ve cam tuc ban thanh le cua vat*.