Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan van mot snippets" » "pham van mot snippets", "thanh van mot snippets", "luan van mot snippets", "phan han mot snippets", "phan van mo snippets", "phan gian mot 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 van mot 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 van mot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan van mot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan van mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.