Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cac cong » cua cong
va thanh » gia thanh, ban thanh, va tinh
thu dan » thuc dan, thu dang, thu ban
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va
nang xa » nang x, lang xa, nang ma
dan ky » van ky
cac ho » cac hop, cac hoc, cac co

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 xa hoi. ((hieu va) OR (hieu qua)) ((cac ho) OR (cac cong)) va thanh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu dan ky nang xa hoi. ((hieu va) OR (hieu qua)) ((cac ho) OR (cac cong)) va thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu dan ky nang xa hoi. ((hieu va) OR (hieu qua)) ((cac ho) OR (cac cong)) va thanh hai cua tre*.