Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
soc va » hoc va, loc va, doc va
di cua » dai cua, doi cua, de 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 y ((nang xa) or (lang xa)) hoi. hieu van cham soc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((nang xa) OR (lang xa)) hoi. hieu van cham soc va hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach y ((nang xa) or (lang xa)) hoi. hieu van cham soc va hanh di cua triet*.