Perhaps you should try some spelling variations:
ban benh » san benh, ban banh, can benh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
cam duc » cam xuc, cao duc, pham duc
ba benh » va benh, bo benh, bach benh
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de 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) OR (te sach)) ky nang xa hoi. hieu van cam duc ((ban benh) or (ba benh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang xa hoi. hieu van cam duc ((ban benh) OR (ba benh)) di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang xa hoi. hieu van cam duc ((ban benh) or (ba benh)) di cua tre*".