Perhaps you should try some spelling variations:
thien van » thi van
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
thanh di » thanh doi, thanh de, thanh do
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de cua

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) or (toc sach)) y nang xa hoi. thien van cac duc van thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y nang xa hoi. thien van cac duc van thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y nang xa hoi. thien van cac duc van thanh di cua tre*.