Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
sang mai » sang ma, lang mai, hoang mai
chat xuc » chat huu, cam xuc, chat cua
sang tai » hang tai, sang tao, tang tai
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
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: thu sach ky ((sang mai) or (sang tai)) hoi. hieu ve ((chat xuc) OR (chao xu)) ban thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((sang mai) OR (sang tai)) hoi. hieu ve ((chat xuc) OR (chao xu)) ban thanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((sang mai) or (sang tai)) hoi. hieu ve ((chat xuc) OR (chao xu)) ban thanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((sang mai) or (sang tai)) hoi. hieu ve ((chat xuc) OR (chao xu)) ban thanh vi cua vat*.