Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pho toan cao snippets" » "phong toan cao snippets", "phap toan cao snippets", "pho tam cao snippets", "pho toan ban snippets", "pho toan tap 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: (((("pho toan 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: (((("pho toan cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pho toan cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pho toan cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.