Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
kem cua » em cua, keo cua, diem cua
x hoi » o hoi, x ho, 5 hoi

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 ky nang ((x hoi) OR (xa hoi)). ((hieu ve) or (hieu van)) cam luc van hanh kem cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x hoi) OR (xa hoi)). ((hieu ve) OR (hieu van)) cam luc van hanh kem cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) OR (xa hoi)). ((hieu ve) or (hieu van)) cam luc van hanh kem cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) OR (xa hoi)). ((hieu ve) or (hieu van)) cam luc van hanh kem cua triet*.