Perhaps you should try some spelling variations:
thien van » thi van
thuoc bao » thuoc bo, thuoc ban, thuoc bat
lam thuoc » nam thuoc, am thuc, cay thuoc
toc sach » hoc sach, doc sach, thuoc sach
bao benh » ba benh, bo benh, buou benh
lang van » dang van, tang van, hoang van
benh vi » benh va, benh ve, benh li
van lam » van nam
lang ha » long ha
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: ((te sach) OR (toc sach)) y ((lang van) or (lang ha)) hoi. thien van lam thuoc bao benh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y ((lang van) OR (lang ha)) hoi. thien van lam thuoc bao benh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y ((lang van) or (lang ha)) hoi. thien van lam thuoc bao benh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) y ((lang van) or (lang ha)) hoi. thien van lam thuoc bao benh vi cua tre*.