Perhaps you should try some spelling variations:
"duong linh dan snippets" » "cuong linh dan snippets", "duong minh dan snippets", "duong sinh dan snippets", "duong binh dan snippets", "duong hinh dan snippets", "duong minh danh snippets", "duong linh dan slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duong linh dan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong linh dan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong linh dan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong linh dan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.