Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran vu don snippets" » "tran tu don snippets", "tran van don snippets", "trang va don snippets", "tran vu dong snippets", "tran va don snippets", "tran vu son 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: (((("tran vu don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran vu don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran vu don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran vu don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.