Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"van hoi dat slippers" » "van choi dat slippers", "van hoai dat slippers", "van khoi dat slippers", "van hoi dap slippers", "van hoi dan slippers", "van hoc dat slippers", "van hoi dat slippery", "van hoi dat 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 java java snippets") or ("van hoi dat slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("van hoi dat slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van hoi dat slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van hoi dat slippers"))) or ("locating bug code snippets"))*.