Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa tre cho snippets" » "khoe tre cho snippets", "khoa tri cho snippets", "khoa dr cho snippets", "khoa te cho snippets", "khoa tra cho snippets", "khoa trien cho 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: (((("khoa tre cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa tre cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa tre cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa tre cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.