Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » thu sach, su sach, te sach
cao xuc » cam xuc, cao duc, cao suc
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
nang o » nang co, nang ho, nang ro
cua te » cua tu
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 (thuat sach)) ky nang o hoi. hieu va cao xuc va hanh dai ((cua triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang o hoi. hieu va cao xuc va hanh dai ((cua triet) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang o hoi. hieu va cao xuc va hanh dai ((cua triet) or (cua te))*.