Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
duc ban » duc tan, duc van, dua ban
sach ky » sac ky, sach y, sach ty
tao duc » tao duoc, dao duc, cao duc
van tao » van thao, vang tao, van tai
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: thu sach ky nang o hoi. hieu van tao duc ban hanh vai ((((cua triet) or (su triet))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang o hoi. hieu van tao duc ban hanh vai ((((cua triet) OR (su triet))) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang o hoi. hieu van tao duc ban hanh vai ((((cua triet) or (su triet))) or (cua te))*.