Perhaps you should try some spelling variations:
"data using java slippers" » "data using data slippers", "data using java slippery", "data using java grippers"
"dung nhan code snippets" » "dung luan code snippets", "dung nhan co snippets", "dung nhan con snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 nhan code snippets") or ("data using java slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung nhan code snippets") OR ("data using java slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung nhan code snippets ) or ( data using java slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung nhan code snippets") or ("data using java slippers"))) or ("locating bug code snippets"))*.