Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham tu oi snippets" » "phan tu oi snippets", "pham thi oi snippets", "pham tai oi snippets", "pham tu doi snippets", "pham tu loi snippets", "pham ta oi 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: (((("pham tu oi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham tu oi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham tu oi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham tu oi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.