Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phong su hoc snippets" » "phong slu hoc snippets", "thong su hoc snippets", "phong tu hoc snippets", "phong du hoc snippets", "phong so hoc 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 su hoc 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 su hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phong su hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phong su hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.