Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
ban hanh » ban hang
xuc ban » duc ban, cuc ban, quoc ban
hai cua » thai cua, dai cua, hoi cua
tu sach » su sach, te sach, tu cach
hang ca » hang va, nang cao, hang tai
ty hang » ly hang, ty xang, thi hang
ca hoi » cau hoi, cua hoi, xa hoi
qua ca » qua cac, qua cua, qua cai
ca xuc » cam xuc, chat xuc

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 (thu sach)) ty hang ca hoi. hieu qua ca xuc ban hanh ((hai cua) or (hoi chuc)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty hang ca hoi. hieu qua ca xuc ban hanh ((hai cua) OR (hoi chuc)) tu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty hang ca hoi. hieu qua ca xuc ban hanh ((hai cua) or (hoi chuc)) tu*.