Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc dung tue snippets" » "duc hung tue snippets", "duc cuong tue snippets", "duc phung tue snippets", "duc dung tu snippets", "duc dung te snippets", "duc dung tuyen 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: (((("duc dung tue snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc dung tue snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc dung tue snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc dung tue snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.