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