Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quan den can snippets" » "quan doan can snippets", "quan he can snippets", "quan doi can snippets", "quan den cac snippets", "quan den cam snippets", "quan dieu can 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: (((("quan den 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: (((("quan den can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quan den can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quan den can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.