Perhaps you should try some spelling variations:
ban thuoc » dang thuoc, cay thuoc, nam thuoc
thu sach » tu sach, thuat sach, thuoc sach
thuoc va » thuc va, thuoc ma, thuong va
toc sach » hoc sach, doc sach, thuoc sach
long ha » dong ha, dong hoa, cong hoa
cong ha » cong hoa, dong ha, cong tac
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
ve ban » te ban, va ban, ve bao
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) or (toc sach)) ky ((long ha) or (cong ha)) noi. hieu ve ban thuoc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (toc sach)) ky ((long ha) OR (cong ha)) noi. hieu ve ban thuoc va danh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (toc sach)) ky ((long ha) or (cong ha)) noi. hieu ve ban thuoc va danh vi cua tre*.