Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
cam luc » cam xuc, cau luc
lam cua » nam cua, lam chat
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
so hoc » co hoc, mo hoc, so hoa
ve cam » ve cham, ve cac, va cam
o hoi » co hoi, o hoc, o hai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ((o hoi) OR (so hoc)). hieu ve cam luc ((va thanh) OR (ban thanh)) lam cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang ((o hoi) or (so hoc)). hieu ve cam luc ((va thanh) OR (ban thanh)) lam cua triet~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ((o hoi) or (so hoc)). hieu ve cam luc ((va thanh) OR (ban thanh)) lam cua triet*.