Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cac toc » cac toi, cac nuoc, cac thoi
hieu va » lieu va, hieu qua
tu cach » tu cac
nang xa » nang x, nang ma, mang xa
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
toc va » hoc va, toc ta, tuc va
va cua » va chua, via cua, ca 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 cach) or (su sach)) ky ((nang xa) or (lang xa)) hoi. hieu va cac toc va hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky ((nang xa) OR (lang xa)) hoi. hieu va cac toc va hanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky ((nang xa) or (lang xa)) hoi. hieu va cac toc va hanh va cua triet*.