Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran vu du snippets" » "tran tu du snippets", "tran van du snippets", "trang va du snippets", "tran vu duc snippets", "tran vu duy snippets", "tran va du 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 du 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 du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran vu du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran vu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.