Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa tre cac snippets" » "khoe tre cac snippets", "khoa tri cac snippets", "khoa dr cac snippets", "khoa te cac snippets", "khoa tre can 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 cac 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 cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa tre cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa tre cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.