Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
thuc van » thuc vat, thuc dan, thuc va
thanh vi » hanh vi, thanh va, thanh ve
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y ((lang van) OR (tang van)) hoi. hieu ve pham thuc van thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((lang van) OR (tang van)) hoi. hieu ve pham thuc van thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y ((lang van) OR (tang van)) hoi. hieu ve pham thuc van thanh vi cua tre*.