Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham truc » cau truc, nham thuc, pham thuc
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, va tinh, le thanh
tu sach » thu sach, su sach, te sach
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 (co sach)) ky nang x hoi. hieu ve cham truc ((va thanh) OR (ban thanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (co sach)) ky nang x hoi. hieu ve cham truc ((va thanh) OR (ban thanh)) vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (co sach)) ky nang x hoi. hieu ve cham truc ((va thanh) OR (ban thanh)) vi cua triet*".