Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phong so tom snippets" » "phong mo tom snippets", "phong cho tom snippets", "cong so tom snippets", "phong ao tom snippets", "phong so toc 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: (((("phong so tom snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phong so tom snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phong so tom snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phong so tom snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.