Perhaps you should try some spelling variations:
thu dan » thuc dan, thu dang, thu ban
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
dan ky » van ky
ve dao » va dao, ve bao, te dao
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu dan ky nang ((x hoi) OR (o hoi)). hieu ((ve dao) or (de dao)) duc va hanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu dan ky nang ((x hoi) OR (o hoi)). hieu ((ve dao) OR (de dao)) duc va hanh di cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu dan ky nang ((x hoi) OR (o hoi)). hieu ((ve dao) or (de dao)) duc va hanh di cua tu".
• Adding a wildcard symbol may retrieve word variants: thu dan ky nang ((x hoi) OR (o hoi)). hieu ((ve dao) or (de dao)) duc va hanh di cua tu*.