Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xac cham voi snippets" » "xac pham voi snippets", "tac pham voi snippets", "toc cham voi snippets", "xac cham hoi snippets", "xac cham soc 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: (((("xac cham voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xac cham voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xac cham voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xac cham voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.