Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
tay lang » tai lang, tay tang, tay quang
ban hanh » ban hang
vai cua » dai cua, hai cua, lai cua
xuc ban » duc ban, cuc ban, quoc ban
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
ty hang » ly hang, ty xang, thi hang
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (vu sach)) ((tay lang) or (ty hang)) xa hoi. hieu van cau xuc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (vu sach)) ((tay lang) OR (ty hang)) xa hoi. hieu van cau xuc ban hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (vu sach)) ((tay lang) or (ty hang)) xa hoi. hieu van cau xuc ban hanh vai cua tre*.