Perhaps you should try some spelling variations:
chieu ke » hieu ky, hieu ve, hieu kem
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
vu sach » vu bach, su sach, vu khach
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, ma hoa, me hoi
ke cau » ket cau
vu va » vu van, tu va
su va » su van, tu va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang ((ma hoi) or (mai hoi)). chieu ke cau luc va hanh ((vu va) OR (su va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang ((ma hoi) OR (mai hoi)). chieu ke cau luc va hanh ((vu va) OR (su va)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang ((ma hoi) or (mai hoi)). chieu ke cau luc va hanh ((vu va) OR (su va)) triet".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang ((ma hoi) or (mai hoi)). chieu ke cau luc va hanh ((vu va) OR (su va)) triet*.