Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh di » thanh doi, thanh de, thanh do
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
ky tang » ky nang, ky dang, kho tang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ((mai hoi) OR (dai hoi)). hieu ((ve cam) OR (va cam)) xuc van thanh di cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ((mai hoi) OR (dai hoi)). hieu ((ve cam) or (va cam)) xuc van thanh di cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ((mai hoi) OR (dai hoi)). hieu ((ve cam) or (va cam)) xuc van thanh di cua vat*.