Perhaps you should try some spelling variations:
"dngu java java snippets" » "ngu java java snippets"
"ban than java slippers" » "ban think java slippers", "ban than va slippers", "ban thanh java slippers", "van thanh java slippers", "ban hang java slippers", "ban than java slippery", "ban than java 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: (((("dngu java java snippets") or ("ban than java slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dngu java java snippets") OR ("ban than java slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dngu java java snippets ) or ( ban than java slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dngu java java snippets") or ("ban than java slippers"))) or ("locating bug code snippets"))*.