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