Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den vung ho snippets" » "ben vung ho snippets", "dan vung ho snippets", "tren vung ho snippets", "den vung hoc snippets", "den vung cho snippets", "den vung kho snippets"
"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: (((("den vung ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den vung ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den vung ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den vung ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.