Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dang su hoc snippets" » "dang tu hoc snippets", "dang du hoc snippets", "dang so hoc snippets", "dan su hoc snippets", "dung su hoc snippets", "dong su 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: (((("dang su 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: (((("dang su hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang su hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang su hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.