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