Perhaps you should try some spelling variations:
hoang van » hang va
nam thuc » nam thuoc, am thuc, nam thu
lang van » dang van, tang van, giang van
va danh » va dinh, va dan, va hanh
so sach » so sanh, bo sach, co sach
hieu he » hieu ve, hiem he, hieu le
he nam » ha nam, nghe nam
va dao » ca dao
de cua » le cua, te cua, dieu cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((lang van) or (hoang van)) hoi. hieu he nam thuc ((va danh) or (va dao)) de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((lang van) OR (hoang van)) hoi. hieu he nam thuc ((va danh) OR (va dao)) de cua te.
• Adding a wildcard symbol may retrieve word variants: so sach y ((lang van) or (hoang van)) hoi. hieu he nam thuc ((va danh) or (va dao)) de cua te*.