Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung he doanh slippers" » "dung de doanh slippers", "dung te doanh slippers", "dung hoa doanh slippers", "dung cho doanh slippers", "dung he doanh slippery", "dung he doanh grippers"
"locating bug code snippets" » "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: (((("dung he doanh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung he doanh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung he doanh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung he doanh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.