Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan hai long snippets" » "dan hai phong snippets", "dan hai duong snippets", "doan hai long snippets", "dang hai long snippets", "dan khai long 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: (((("dan hai long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan hai long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan hai long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan hai long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.