Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
dang van » hoang van, hang va
thanh ve » hanh ve, thanh va, thanh vien
tang van » hoang van, trong van, tang luan
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
tuc ban » thuc ban, truc ban, tu ban
hieu ve » hieu va
sach ty » sach y, sach tu, sach thu
cam tuc » cam xuc, cam tu, nam thuc
ve cua » le cua, de cua, te 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) OR (hieu van)) cam tuc ban thanh ve 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) OR (hieu van)) cam tuc ban thanh ve cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((dang van) or (tang van)) hoi. ((hieu ve) OR (hieu van)) cam tuc ban thanh ve cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((dang van) or (tang van)) hoi. ((hieu ve) OR (hieu van)) cam tuc ban thanh ve cua vat*.