Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"pha duc hoan snippets" » "pha duc code snippets", "pha duc hoang snippets", "pha duc hoa snippets", "pha duc toan snippets", "pham duc hoan snippets", "phan duc hoan snippets", "pha du hoan snippets"
"python using java snippets" » "python using data 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: (((("pha duc hoan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pha duc hoan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( pha duc hoan snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pha duc hoan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.