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