Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
ty nang » ky nang, ty hang, ly nang

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 ((ty nang) OR (ty xang)) xa hoi. ((hieu ve) or (hieu va)) cam cuc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) xa hoi. ((hieu ve) OR (hieu va)) cam cuc ban hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty xang)) xa hoi. ((hieu ve) or (hieu va)) cam cuc ban hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty xang)) xa hoi. ((hieu ve) or (hieu va)) cam cuc ban hanh vai cua tre*.