Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua khai can snippets" » "qua hai can snippets", "quang khai can snippets", "quan hai can snippets", "qua khai cac snippets", "qua khoi can snippets", "qua khai tuan 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 khai can 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 khai can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua khai can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua khai can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.