Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quan van bot snippets" » "luan van bot snippets", "quan va bot snippets", "quan luan bot snippets", "quan van bon snippets", "quan van hoat snippets", "quan dang bot 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 van bot 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 van bot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quan van bot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quan van bot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.