Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua noi cong snippets" » "qua nguoi cong snippets", "qua tai cong snippets", "qua thi cong snippets", "qua loi cong snippets", "chua noi cong snippets", "qua ngon cong 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: (((("qua noi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qua noi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua noi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua noi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.