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