Perhaps you should try some spelling variations:
nhanh dien » nhan dien, nganh dien, nhan vien
cua triet » cua viet, su triet, va triet
hanh dien » hang dien, danh dien, hanh dieu
te sach » toc sach
sach ky » sac ky, sach y, sach ty
luc va » duc va, tuc va, loc va
ke cau » ket cau
nang o » nang co, nang ho, nang ro
va cau » van cau, va cac, va dau
o hoi » co hoi, o hoc, o hai

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