Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
cua triet » cua viet, su triet, va triet
van nhanh » van thanh, van hanh, van khanh
hieu van » hieu va, thien van, lieu va
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
cac duc » cac du, cao duc, cac dac
van cac » van hac, van cau, van bac
nang o » nang co, nang ho, nang ro
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: ((tu sach) or (vu bach)) ky nang o hoi. hieu van cac duc van nhanh thai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu bach)) ky nang o hoi. hieu van cac duc van nhanh thai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu bach)) ky nang o hoi. hieu van cac duc van nhanh thai ((cua tre) or (cua triet))*.