Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khac than vo snippets" » "khan than vo snippets", "khac khanh vo snippets", "khai thac vo snippets", "khac than va snippets", "khac than doc snippets", "khac than hoc 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: (((("khac than vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khac than vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khac than vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khac than vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.