Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van thai » van thoai, van tai, van hai
thai cua » than cua, tai cuc, tri cua
hanh de » hanh ve, hanh kem
hanh di » hang di, danh di, xanh di
tu sach » thu sach, su sach, te sach
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
cua va » cua vat, chua va, cua van
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: tu sach v nang x hoi. hieu van thai cua va ((((hanh di) OR (hanh vi))) or (hanh de)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. hieu van thai cua va ((((hanh di) OR (hanh vi))) 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 thai cua va ((((hanh di) OR (hanh vi))) or (hanh de)) cua triet*".