Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quan doan he snippets" » "quan hoang he snippets", "chuan doan he snippets", "chan doan he snippets", "quan toan he snippets", "quan dan he snippets", "quan doan thi 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 doan he 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 doan he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quan doan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quan doan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.