Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh do, thanh dinh
thanh de » hanh de, thanh ve, thanh do
tu sach » thu sach, su sach, te sach
ly hang » ly quang
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
cau luc » cau truc, cau phuc
luc gia » luoc gia, duc gia, quoc gia
va cau » van cau, va cac, va dau
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly hang ((xa hoi) or (o hoi)). hieu va cau luc gia ((thanh di) or (thanh de)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly hang ((xa hoi) OR (o hoi)). hieu va cau luc gia ((thanh di) OR (thanh de)) cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ly hang ((xa hoi) or (o hoi)). hieu va cau luc gia ((thanh di) or (thanh de)) cua te*.