Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap dao cao snippets" » "phap day cao snippets", "phap dam cao snippets", "phap dau cao snippets", "phap dao tao snippets", "phap bao cao snippets", "phap tao cao 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 dao 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 dao cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap dao cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap dao cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.