Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cuoi van » cuoi dan, bui van, cao van
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va kham » va cham, va khao, va tham
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((nang xa) OR (nang ma)) hoi. lieu va kham ((cuoi van) OR (cuu van)) hanh di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang xa) or (nang ma)) hoi. lieu va kham ((cuoi van) OR (cuu van)) hanh di cua triet~".
• Adding a wildcard symbol may retrieve word variants: vu sach y ((nang xa) or (nang ma)) hoi. lieu va kham ((cuoi van) OR (cuu van)) hanh di cua triet*.