Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thanh lai » thanh hai, thanh lap, thanh loi
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
lai cua » dai cua, hai cua, lai chau
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, 5 hoi

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 ky nang ((x hoi) or (x ho)). hieu va cao duc tan thanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((x hoi) OR (x ho)). hieu va cao duc tan thanh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) or (x ho)). hieu va cao duc tan thanh lai cua triet*.