Perhaps you should try some spelling variations:
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
cam thu » nam thu, cac thu, ca thu
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc
va cam » va cham, va cac, va cao
thu va » thuc va, thue va, tu va
di cua » dai cua, doi cua, de cua

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) or (vay khach)) ky nang ((co loi) or (co hoi)). hieu va cam thu va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vay khach)) ky nang ((co loi) OR (co hoi)). hieu va cam thu va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vay khach)) ky nang ((co loi) or (co hoi)). hieu va cam thu va hanh di cua tre*.