Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
thanh di » thanh de, thanh do, thanh dinh
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
ve cam » ve cham, ve cac, va cam
ma hoi » xa hoi, ma hoa, me hoi

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 sang ((ma hoi) OR (mai hoi)). hieu ve cam xuc van ((thanh di) OR (thanh doi)) cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang ((ma hoi) or (mai hoi)). hieu ve cam xuc van ((thanh di) OR (thanh doi)) cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ((ma hoi) or (mai hoi)). hieu ve cam xuc van ((thanh di) OR (thanh doi)) cua vat*.