Perhaps you should try some spelling variations:
thanh hinh » thanh binh, thanh tinh, thanh vinh
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
nam mua » nam cua, nam qua, nam luat
nam xua » nam cua, nam qua, nam luat
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
nang o » nang co, nang ho, nang ro
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 (vu sach)) ty nang o hoi. hieu va ((nam xua) or (nam mua)) ban thanh hinh su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ty nang o hoi. hieu va ((nam xua) OR (nam mua)) ban thanh hinh su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ty nang o hoi. hieu va ((nam xua) or (nam mua)) ban thanh hinh su triet*.