Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dich han hoc snippets" » "dich phan hoc snippets", "dich can hoc snippets", "dich ran hoc snippets", "dich nhan hoc snippets", "dich than hoc snippets", "dich van 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: (((("dich han hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dich han hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dich han hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dich han hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.