Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan kinh do snippets" » "than kinh do snippets", "phan dinh do snippets", "phan minh do snippets", "phan kinh co snippets", "phan trinh do snippets", "phan kinh hoc 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: (((("phan kinh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan kinh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan kinh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan kinh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.