Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa mo di snippets" » "khoa ma di snippets", "khoa co di snippets", "khoa mong di snippets", "khoa mo dai snippets", "khoa so di snippets", "khoa mo de 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: (((("khoa mo di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa mo di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa mo di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa mo di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.