Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
lam xuc » lam duoc
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang cao hoi. hieu van ((((lam xuc) or (cam xuc))) or (nam thuoc)) ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang cao hoi. hieu van ((((lam xuc) OR (cam xuc))) OR (nam thuoc)) ban thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang cao hoi. hieu van ((((lam xuc) or (cam xuc))) or (nam thuoc)) ban thanh vi cua tre*.