Perhaps you should try some spelling variations:
nhan loai » phan loai, nhan tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu vu » hieu va, hieu ve, hieu su
vu nhan » cu nhan, vu ngan, tu nhan
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu vu nhan loai ((va danh) OR (va hanh)) dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu vu nhan loai ((va danh) OR (va hanh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu vu nhan loai ((va danh) OR (va hanh)) dai cua tre*.