Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham dang cu snippets" » "phan dang cu snippets", "pham hang cu snippets", "pham quang cu snippets", "pham dang su snippets", "pham dung cu snippets", "pham dan cu 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 dang cu 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 dang cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham dang cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham dang cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.