Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua dan soc snippets" » "qua danh soc snippets", "qua ban soc snippets", "cua dan soc snippets", "qua dan toc snippets", "qua dan hoc snippets", "qua dan so 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 dan soc 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 dan soc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua dan soc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua dan soc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.