Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan vu cho snippets" » "doan va cho snippets", "doan vi cho snippets", "doan tu cho snippets", "doan vu cao snippets", "doan cu cho snippets", "doan uu cho 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: (((("doan vu cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan vu cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan vu cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan vu cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.