Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc va » thuc va, thuoc ma, thuong va
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
sach v » sach va, sach 2, sach vay
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach v) or (sach y)) nang x hoi. ((hieu ve) or (hieu va)) nam thuoc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach v) OR (sach y)) nang x hoi. ((hieu ve) OR (hieu va)) nam thuoc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((sach v) or (sach y)) nang x hoi. ((hieu ve) or (hieu va)) nam thuoc va hanh vi cua tre*.