Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoe toi du snippets" » "khoe moi du snippets", "khoe tai du snippets", "khoe doi du snippets", "khoe toi uu snippets", "khoe tri du snippets", "khoe toi da 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: (((("khoe toi du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoe toi du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoe toi du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoe toi du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.