Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
cao hoi » cau hoi, co hoi, tao hoi
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc ban » duc tan, duc van, dua ban
ban anh » ban hanh, ban banh, ban danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
di cua » doi cua, de cua, do cua

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: tu sac ky nang ((cao hoi) OR (cao hoc)). hieu ve cham duc ban anh ((di cua) OR (dai cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((cao hoi) OR (cao hoc)). hieu ve cham duc ban anh ((di cua) or (dai cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((cao hoi) OR (cao hoc)). hieu ve cham duc ban anh ((di cua) or (dai cua)) triet*.