Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
te sach » toc sach
xuc ban » duc ban, cuc ban, quoc ban
hieu ve » hieu va
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo
nang o » nang co, nang ho, nang ro
vi cuu » vi luu, vinh cuu
o hoi » co hoi, o hoc, o hai

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 (so sach)) ky nang o hoi. ((hieu ve) OR (hieu van)) cam xuc ban hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (so sach)) ky nang o hoi. ((hieu ve) OR (hieu van)) cam xuc ban hanh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (so sach)) ky nang o hoi. ((hieu ve) OR (hieu van)) cam xuc ban hanh vi cuu tre*".