Perhaps you should try some spelling variations:
ban hanh » ban hang
tru nang » tra nang, tri nang, thi nang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
cuc ban » cua ban, cac ban, cuu ban
lam cuc » lam cua, lam duoc, pham cuc
van lam » van nam
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
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: ((tu sach) OR (te sach)) ((tru nang) or (truc nano)) xa hoi. hieu van lam cuc ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ((tru nang) OR (truc nano)) xa hoi. hieu van lam cuc ban hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ((tru nang) or (truc nano)) xa hoi. hieu van lam cuc ban hanh vi cua tre*".