Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
van luan » van quan, van tuan, von luan
luoc van » luoc can, luoc va, luc van
tam luoc » tom luoc, dai luoc, tam hoc
hieu van » hieu va, lieu va, hieu ve
luan va » luan van, luat va
te sach » toc sach
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
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: te sach ty ((nang xa) OR (nang x)) hoi. ((hieu van) or (thien van)) tam luoc van luan va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang x)) hoi. ((hieu van) OR (thien van)) tam luoc van luan va cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) OR (nang x)) hoi. ((hieu van) or (thien van)) tam luoc van luan va cua triet*".