Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan dan hoat snippets" » "dan dan code snippets", "dan van hoa snippets", "dan dan hoc snippets", "dan danh hoa snippets", "dang dan hoat snippets", "ban dan hoat snippets", "dao dan hoat 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: (((("dan dan hoat snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan dan hoat snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dan dan hoat snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan dan hoat snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.