Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan thi hoc snippets" » "dan thi hoc snippets", "doanh tai hoc snippets", "hoang thi hoc snippets", "doan thai hoc snippets", "doan tri hoc snippets", "doan thi hoa 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: (((("doan thi 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: (((("doan thi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan thi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan thi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.