Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh via » hanh vi, hanh va, anh va
su sach » so sach, vu sach
ky sang » ky dang, ky tang, duy sang
hieu va » lieu va, hieu qua
via cua » gia cua, gian cua, giau cua
va bao » va bai
bao bo » bac bo, ban bo, nao bo
bo van » vo van, so van, do van

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky sang) or (ky nang)) xa hoi. hieu va bao bo van hanh via cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky sang) OR (ky nang)) xa hoi. hieu va bao bo van hanh via cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky sang) or (ky nang)) xa hoi. hieu va bao bo van hanh via cua triet*.