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