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