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