Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung moi he snippets" » "dung mo he snippets", "dung doi he snippets", "dung mot he snippets", "dung moi ve snippets", "dung moi ke snippets", "dung moi de 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 moi he 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 moi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung moi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung moi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.