Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"moi dan voi snippets" » "moi dang voi snippets", "hoi dan voi snippets", "doi dan voi snippets", "moi dan hoi snippets", "moi ban voi snippets", "moi da 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: (((("moi dan 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: (((("moi dan voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( moi dan voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("moi dan voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.