Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua toan co snippets" » "cua toan co snippets", "qua tan co snippets", "qua than co snippets", "qua toan cao snippets", "qua toan ho snippets", "qua toan hoc 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 toan co 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 toan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua toan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua toan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.