Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
van chat » cao chat
lang xa » lang ha, dang xay, lang van
duoc va » nuoc va, duc va, duoc ma
hanh di » hanh vi, hanh de, hang di
te sach » toc sach
doc va » hoc va, duc va, loc 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: te sach y ((nang cao) or (lang xa)) hoi. thien van chat ((doc va) OR (duoc va)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang cao) OR (lang xa)) hoi. thien van chat ((doc va) OR (duoc va)) hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang cao) or (lang xa)) hoi. thien van chat ((doc va) OR (duoc va)) hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang cao) or (lang xa)) hoi. thien van chat ((doc va) OR (duoc va)) hanh di cua triet*.