Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
va thanh » gia thanh, ban thanh, va tinh
lang van » dang van, tang van, hoang van
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
de cua » le cua, te cua, dieu cua
va cam » va cham, va cac, va cao

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 ((nang x) or (lang van)) hoi. hieu ((va cam) or (vo co)) xuc va thanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang x) OR (lang van)) hoi. hieu ((va cam) OR (vo co)) xuc va thanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang x) or (lang van)) hoi. hieu ((va cam) or (vo co)) xuc va thanh de cua tre*.