Perhaps you should try some spelling variations:
thien van » thi van
san benh » sau benh, tai benh, so benh
ban benh » ba benh, ban banh, can benh
nam xuc » cam xuc, nam xua, nam thuc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
li cua » lai cua, le cua, ly 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 xa) or (nang ma)) hoi. thien van nam xuc ((ban benh) OR (san benh)) li cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang ma)) hoi. thien van nam xuc ((ban benh) OR (san benh)) li cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) or (nang ma)) hoi. thien van nam xuc ((ban benh) OR (san benh)) li cua tre*".