Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phuc sen den snippets" » "phuc se den snippets", "phu yen den snippets", "phu san den snippets", "phuc chen den snippets", "phuc den dien 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: (((("phuc sen den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phuc sen den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phuc sen den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phuc sen den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.