Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh di » thanh doi, thanh de, thanh do
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cau tuc » cau truc, cau tu, cau luc
mai hoi » mai khoi, dai hoi, lai hoi
tuc van » thuc van, truc van, tuc va
van cau » van dau, van hau, van chat
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 (hoc sach)) ky nang ((mai hoi) or (xa hoi)). hieu van cau tuc van thanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky nang ((mai hoi) OR (xa hoi)). hieu van cau tuc van thanh di cua vat.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang ((mai hoi) or (xa hoi)). hieu van cau tuc van thanh di cua vat*.