Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
di cua » dai cua, doi cua, de cua
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: tu cac ky nang ((((o hoi) OR (co hoi))) or (x ho)). lieu va cham duc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((((o hoi) OR (co hoi))) OR (x ho)). lieu va cham duc va hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((((o hoi) OR (co hoi))) or (x ho)). lieu va cham duc va hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((((o hoi) OR (co hoi))) or (x ho)). lieu va cham duc va hanh di cua tre*.