Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
ban benh » ba benh, ban banh, can benh
san benh » sau benh, tai benh, so benh
van cam » van nam, van lam, van cau
cam cuc » cam xuc, cham cuu, pham cuc
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu 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: thu sach y nang x hoi. hieu van cam cuc ((ban benh) OR (san benh)) ((di cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu van cam cuc ((ban benh) OR (san benh)) ((di cua) OR (de cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu van cam cuc ((ban benh) OR (san benh)) ((di cua) or (de cua)) tre*".