Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, lai cua
hoi cua » hoi chuc
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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: tu sach v nang x hoi. hieu van ((hai cua) OR (hoi cua)) va ((hanh di) OR (hanh de)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x hoi. hieu van ((hai cua) OR (hoi cua)) va ((hanh di) or (hanh de)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. hieu van ((hai cua) OR (hoi cua)) va ((hanh di) or (hanh de)) cua triet*.