Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tong van do snippets" » "trong van do snippets", "thong van do snippets", "tang van do snippets", "tong van dao snippets", "tong van de snippets", "tong van 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: (((("tong van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tong van do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tong van do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tong van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.