Perhaps you should try some spelling variations:
sach chu » sach che, sach thu, sach thue
chu bang » thu bang, chuc nang, chu quang
ban danh » ban doanh, ban hanh, ban dan
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
bang o » bang mo, lang o, tang o
va cam » va cham, va cac, va cao
de cua » le cua, te cua, dieu cua
o hoi » co hoi, o hoc, o hai
d cua » do cua, da 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: tu sach chu bang o hoi. hieu va cam cuc ban danh ((d cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach chu bang o hoi. hieu va cam cuc ban danh ((d cua) OR (de cua)) tre*.