Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang dai » nang dau, nang tai, lang dai
lang van » dang van, tang van, hoang van
va chat » van chat, va phat, cao chat
sach ty » sach y, sach tu, sach thu
te sach » toc sach
lang xa » lang ha, dang xay
hieu va » lieu va, hieu qua
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va

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 ((lang xa) or (lang van)) hoi. hieu va chat ((soc va) OR (loc va)) nang dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((lang xa) OR (lang van)) hoi. hieu va chat ((soc va) OR (loc va)) nang dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((lang xa) or (lang van)) hoi. hieu va chat ((soc va) OR (loc va)) nang dai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((lang xa) or (lang van)) hoi. hieu va chat ((soc va) OR (loc va)) nang dai cua triet*.