Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu phan » phieu phan, lieu phan, hieu pham
thanh dat » thanh san, thanh hai, thanh van
thu sach » thuat sach, thuoc sach, thu hoach
phan dau » phan tu, hang dau
su triet » su viet, su tien, ve triet
tu sach » su sach, te sach, tu cach
dau duc » dao duc, dang duc, dau nuoc
duc ban » duc tan, duc van, dua ban
nang o » nang co, nang ho, nang ro
dat su » sat su
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 (thu sach)) ky nang o hoi. hieu phan dau duc ban thanh dat su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang o hoi. hieu phan dau duc ban thanh dat su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang o hoi. hieu phan dau duc ban thanh dat su triet*.