Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
sach ki » sach kinh, sach bai, sach kem
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
ki nang » ky nang
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cai
nang o » nang co, nang ho, nang ro
va cao » va cac, va co, va dao
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 ki nang o hoi. hieu ((va cam) OR (va cao)) tuc va hanh vai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ki nang o hoi. hieu ((va cam) OR (va cao)) tuc va hanh vai ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ki nang o hoi. hieu ((va cam) OR (va cao)) tuc va hanh vai ((cua triet) or (su triet))*".