Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
so sach » so sanh, bo sach, co sach
van cao » van dao, van bao, van hao
cao duc » dao duc, cao suc, giao duc
san cua » sang cua, ban cua, dan cua
cua te » cua tu
x hoi » xa hoi, o hoi, 5 hoi

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 (so sach)) ky nang ((x hoi) or (x ho)). hieu van cao duc va thanh san cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (so sach)) ky nang ((x hoi) OR (x ho)). hieu van cao duc va thanh san cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (so sach)) ky nang ((x hoi) or (x ho)). hieu van cao duc va thanh san cua te*.