Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
san cua » sang cua, ban cua, dan cua
va cam » va cham, va cac, va cao
o hai » co hai, so hai, o lai

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 (su sach)) ty nang ((xa hoi) or (o hai)). hieu va cam xuc ban thanh san cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang ((xa hoi) OR (o hai)). hieu va cam xuc ban thanh san cua vat.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang ((xa hoi) or (o hai)). hieu va cam xuc ban thanh san cua vat*.