Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den xac hoi snippets" » "dan xac hoi snippets", "den cac hoi snippets", "den xa hoi snippets", "den cac thoi snippets", "den cac khoi 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 xac 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 xac hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den xac hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den xac hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.