Perhaps you should try some spelling variations:
sach hien » sach tien, sach thieu, cach thien
hien hanh » dieu hanh
khanh hai » thanh hai, nhanh hai, nhanh thai
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hanh cua » manh cua, hang cua, hanh sua
xa khanh » xa thanh, van khanh, dat khanh
cua hoi » cua moi
cac toc » cac nuoc, cac thoi
cac toi » cac thoi
hai cua » thai cua, dai cua, hoi cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach hien hanh cua hoi. lieu va ((cac toc) or (cac toi)) xa khanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach hien hanh cua hoi. lieu va ((cac toc) OR (cac toi)) xa khanh hai cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach hien hanh cua hoi. lieu va ((cac toc) or (cac toi)) xa khanh hai cua triet*.