Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
cham tuc » nham thuc, pham thuc, tham thuc
te sach » toc sach
hanh ly » khanh ly, hanh ky, hang ly
va hanh » van hanh, va thanh, va danh
sach va » sach xa, sach ha, sach dao
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
va nang » van nang, da nang, cam nang
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi
ly cua » le cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach va nang ((ma hoi) or (mai hoi)). hieu ve ((cham tuc) or (nam thuc)) va hanh ly cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach va nang ((ma hoi) OR (mai hoi)). hieu ve ((cham tuc) OR (nam thuc)) va hanh ly cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach va nang ((ma hoi) or (mai hoi)). hieu ve ((cham tuc) or (nam thuc)) va hanh ly cua tre*.