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