Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung van von snippets" » "duong van von snippets", "dung va von snippets", "dang van von snippets", "dung vay von snippets", "dung van van snippets", "dung van dong 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 van von 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 van von snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung van von snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung van von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.