Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van lam » van nam
lam xuc » cam xuc, lam duoc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet

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 cau hoi. hieu van lam xuc ((va hanh) or (va danh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cau hoi. hieu van lam xuc ((va hanh) OR (va danh)) tai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cau hoi. hieu van lam xuc ((va hanh) or (va danh)) tai cua tre*.