Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
ban hanh » ban hang
chua tre » chua tri, cua tre, chua trieu
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
hieu va » lieu va, hieu qua
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
hanh va » hang va, hanh vi
va chua » vua chua, ca chua, va chu
va cam » va cham, va cac, va cao

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 (te sach)) ky ((dang xay) or (nang ma)) hoi. hieu va cam cuc ban hanh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky ((dang xay) OR (nang ma)) hoi. hieu va cam cuc ban hanh va chua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ky ((dang xay) or (nang ma)) hoi. hieu va cam cuc ban hanh va chua tre*.