Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
thanh di » thanh de, thanh do, thanh dinh
thi hang » thi hanh, thi hong, thi thanh
thi nang » thi cong, ki nang, thi hanh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
van cac » van hac, van cau, van bac
luc gia » luoc gia, duc gia, quoc gia
cac luc » cau luc, coc luc, cac nuoc
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((thi hang) OR (thi nang)) x hoi. hieu van cac luc gia ((thanh di) or (thanh doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thi hang) OR (thi nang)) x hoi. hieu van cac luc gia ((thanh di) OR (thanh doi)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thi hang) OR (thi nang)) x hoi. hieu van cac luc gia ((thanh di) or (thanh doi)) cua tre*".