Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham vinh do snippets" » "pham minh do snippets", "pham dinh do snippets", "pham van do snippets", "pham kinh do snippets", "pham tinh do snippets", "pham trinh do 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: (((("pham vinh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham vinh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham vinh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham vinh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.