Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap nam cao snippets" » "phap nham cao snippets", "pham nam cao snippets", "phap lam cao snippets", "phap nam sao snippets", "phap nam giao 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 nam cao 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 nam cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap nam cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap nam cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.