Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, pham thu
nham thuc » nhan thuc, nam thuc, nham thu
te sach » toc sach
hanh ly » khanh ly, hanh ky, hang ly
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
sach va » sach xa, sach ha, sach dao
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 ((pham thuc) or (nham 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 ((pham thuc) OR (nham 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 ((pham thuc) or (nham thuc)) va hanh ly cua tre*.