Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den voi hoi snippets" » "dien voi hoi snippets", "den coi hoi snippets", "den vai hoi snippets", "den voi doi snippets", "den voi ho snippets", "den doi hoi 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 voi hoi 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 voi hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den voi hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den voi hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.