Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
ha triet » nha triet, va triet, hanh triet
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi
ve cam » ve cham, ve cac, va cam
lam ha » nam ha, dam ha, lam chat
o hoi » o hoc, o hai, o hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang ((o hoi) or (co hoi)). hieu ve cam xuc ((va thanh) OR (ban thanh)) lam ha triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang ((o hoi) OR (co hoi)). hieu ve cam xuc ((va thanh) OR (ban thanh)) lam ha triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang ((o hoi) or (co hoi)). hieu ve cam xuc ((va thanh) OR (ban thanh)) lam ha triet".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang ((o hoi) or (co hoi)). hieu ve cam xuc ((va thanh) OR (ban thanh)) lam ha triet*.