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