Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cum doan o snippets" » "cum dan o snippets", "cua doanh o snippets", "cum danh o snippets", "cum doan do snippets", "cum doan _ snippets", "cum toan o 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: (((("cum doan o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cum doan o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cum doan o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cum doan o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.