Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van doi du snippets" » "van loi du snippets", "van noi du snippets", "van do du snippets", "van doi dau snippets", "van doi deu snippets", "van doi duy 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: (((("van doi du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van doi du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van doi du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van doi du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.