Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"pham thi data slippers" » "pham thi dai slippers", "pham thi dua slippers", "pham thi dan slippers", "phan thi data slippers", "pham thi data slippery", "pham thi data 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: (((("pham thi data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham thi data slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham thi data slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham thi data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.