Perhaps you should try some spelling variations:
sach hay » sach han, sach ha, sach nay
hay lang » ha lang, tay lang, nhan lang
lang van » dang van, tang van, hoang van
nam thuc » nam thuoc, am thuc, nam tu
so sach » so sanh, bo sach, co sach
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
danh te » danh tu, danh het, danh yen
te cua » tue cua, le cua, de 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 hay lang van hoi. hieu ve ((nam thuc) or (nam thu)) va danh te cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hay lang van hoi. hieu ve ((nam thuc) OR (nam thu)) va danh te cua te.
• Adding a wildcard symbol may retrieve word variants: so sach hay lang van hoi. hieu ve ((nam thuc) or (nam thu)) va danh te cua te*.