Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thuoc ban » thuoc tan, thuoc dang, thu ban
hieu van » hieu va, thien van, hieu ve
sach thu » sach thue, sach thieu, sach tham
ban anh » ban hanh, ban banh, ban danh
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
anh vi » hanh vi, anh va, anh ve
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 ty) or (sach thu)) nang xa hoi. ((hieu van) or (lieu va)) lam thuoc ban anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang xa hoi. ((hieu van) OR (lieu va)) lam thuoc ban anh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang xa hoi. ((hieu van) or (lieu va)) lam thuoc ban anh vi cua tre*.