Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan minh oz snippets" » "pham minh oz snippets", "phan dinh oz snippets", "phan kinh oz snippets", "phan minh hoa snippets", "phan minh son snippets", "phan minh hon 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 minh oz 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 minh oz snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan minh oz snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan minh oz snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.