Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
danh xay » manh xay, anh xay, dan xay
sach ky » sac ky, sach y, sach ty
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
ban anh » ban hanh, ban banh, ban danh
anh hoi » anh noi, anh hoc, anh khoa
cua tre » cua te, cuu tre, cua triet
van cam » van nam, van lam, van cau

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 ((danh xay) or (dang xay)) hoi. hieu van cam cuc ban anh hoi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((danh xay) OR (dang xay)) hoi. hieu van cam cuc ban anh hoi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((danh xay) or (dang xay)) hoi. hieu van cam cuc ban anh hoi ((cua tre) or (su triet))*.