Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua mot toan snippets" » "qua mon toan snippets", "qua mot thanh snippets", "qua mot doanh snippets", "quan mot toan snippets", "cua mot toan snippets", "qua tot toan 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 mot toan 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 mot toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua mot toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua mot toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.