Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nham thu, pham thuc
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v nang o hai. hieu van ((nham thuc) OR (nam thuc)) va hanh dai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang o hai. hieu van ((nham thuc) OR (nam thuc)) va hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach v nang o hai. hieu van ((nham thuc) OR (nam thuc)) va hanh dai cua te*.