Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
ty lang » tay lang, ty hang, tu lang
van hoi » van hoa, van hoc, van hoe
thuc va » thuc vat, thuc dan, thuc day
dan dai » dat dai, can dai, dan dat
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ty lang) OR (ty xang)) van hoi. hieu van pham thuc va dan dai cua tre~.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ty lang) or (ty xang)) van hoi. hieu van pham thuc va dan dai cua tre*.