Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh doi » danh di, thanh doi, dung doi
doi cua » dai cua, hoi cua
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach vay
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc va
sach 2 » sach y

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: te ((sach v) OR (sach 2)) nang xa hoi. hieu ve cham ((soc va) OR (doc va)) danh doi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach 2)) nang xa hoi. hieu ve cham ((soc va) OR (doc va)) danh doi cua triet~".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach 2)) nang xa hoi. hieu ve cham ((soc va) OR (doc va)) danh doi cua triet*.