Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, cay thuoc, nam thuc
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
lam xuc » cam xuc, lam duoc
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
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: tu sach ky nang ma hoi. hieu van ((lam xuc) or (((lam thuoc) or (am thuc)))) ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu van ((lam xuc) OR (((lam thuoc) OR (am thuc)))) ban thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu van ((lam xuc) or (((lam thuoc) or (am thuc)))) ban thanh vi cua tre*.