Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan cao hoc snippets" » "juan cao hoc snippets", "luan bao hoc snippets", "quang cao hoc snippets", "luan co hoc snippets", "luan cho hoc snippets", "luan chat 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: (((("luan cao 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: (((("luan cao hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan cao hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan cao hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.