Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
hieu ve » hieu va, hieu van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
ve cam » ve cham, ve cac, va cam
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 ((sang ma) OR (nang ma)) hoi. hieu ve cam ((xuc van) OR (duc van)) thanh di cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((sang ma) OR (nang ma)) hoi. hieu ve cam ((xuc van) or (duc van)) thanh di cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((sang ma) OR (nang ma)) hoi. hieu ve cam ((xuc van) or (duc van)) thanh di cua vat*.