Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
thien van » thi van
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, lieu va, hieu ve
thi hanh » thi thanh
ty hang » ly hang, ty xang, thi hang
te sach » toc sach
luc va » duc va, tuc va, loc va
dai su » dai sua, dai so, dan su
x hoi » xa hoi, o hoi, x ho

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 hang) or (thi hanh)) x hoi. ((hieu van) OR (thien van)) coc luc va thanh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty hang) OR (thi hanh)) x hoi. ((hieu van) OR (thien van)) coc luc va thanh dai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty hang) or (thi hanh)) x hoi. ((hieu van) OR (thien van)) coc luc va thanh dai su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty hang) or (thi hanh)) x hoi. ((hieu van) OR (thien van)) coc luc va thanh dai su triet*.