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