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