Perhaps you should try some spelling variations:
thanh dinh » thanh binh, thanh tinh, thanh vinh
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
cu triet » cua triet, cau triet, tu triet
xua ban » xuat ban, cua ban, qua ban
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va nam » van nam, ha nam
nang o » nang co, nang ho, nang ro
va nay » va ngay, va cay
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: su sach ty nang o hoi. hieu ((va nam) OR (va nay)) xua ban thanh dinh ((cu triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang o hoi. hieu ((va nam) OR (va nay)) xua ban thanh dinh ((cu triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang o hoi. hieu ((va nam) OR (va nay)) xua ban thanh dinh ((cu triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang o hoi. hieu ((va nam) OR (va nay)) xua ban thanh dinh ((cu triet) or (su triet))*.