Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan chi voi snippets" » "phan thi voi snippets", "phan che voi snippets", "pham chi voi snippets", "phan choi voi snippets", "phan khi voi snippets", "phan cham voi 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 chi voi 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 chi voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan chi voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan chi voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.