Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung tri voc snippets" » "dung tai voc snippets", "dung tren voc snippets", "nhung tri voc snippets", "dung tri hoc snippets", "dung thi voc snippets", "dung tri von 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: (((("dung tri voc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tri voc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tri voc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tri voc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.