Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua la toan snippets" » "qua lap toan snippets", "qua va toan snippets", "qua le toan snippets", "qua lao toan snippets", "qua lau toan snippets", "qua ca 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 la 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 la toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua la toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua la toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.