Perhaps you should try some spelling variations:
tri nang » thi nang, tra nang, tri mang
tri bang » tri ban, tri mang, thai bang
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
van lam » van nam
lam cuc » lam cua, lam duoc, pham cuc
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
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 ((tri nang) OR (tri bang)) 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 ((tri nang) OR (tri bang)) xa hoi. hieu van lam cuc ban hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tri nang) OR (tri bang)) xa hoi. hieu van lam cuc ban hanh vi cua tre*.