Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
van hoc » van hoa
nam xuc » cam xuc, nam xua, nam thuc
cuu tre » cua tre, cau tren, cau treo
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
xuc va » duc va, tuc va, luc va
va dau » va dao
dau va » dau ve, lau va

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 ((y lang) or (_ lang)) van hoc. hieu van nam xuc va dau va ((cua vat) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (_ lang)) van hoc. hieu van nam xuc va dau va ((cua vat) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) or (_ lang)) van hoc. hieu van nam xuc va dau va ((cua vat) or (cuu tre))*.