Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan kinh da snippets" » "than kinh da snippets", "phan dinh da snippets", "phan minh da snippets", "phan kinh dao snippets", "phan tinh da snippets", "phan kinh do 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: (((("phan kinh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan kinh da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan kinh da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan kinh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.