Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
thanh di » thanh de, thanh do, thanh dinh
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
vu sach » vu bach, su sach, vu khach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
ve nam » he nam, va nam, le nam
cua cu » cua chu, cua cau, cua su

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: vu sach ty ((nang xa) OR (nang x)) hoi. hieu ve nam thuc ban ((thanh di) OR (thanh doi)) cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty ((nang xa) or (nang x)) hoi. hieu ve nam thuc ban ((thanh di) OR (thanh doi)) cua cu~".
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((nang xa) or (nang x)) hoi. hieu ve nam thuc ban ((thanh di) OR (thanh doi)) cua cu*.