Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van du deu snippets" » "van duy deu snippets", "van dau deu snippets", "van de deu snippets", "van dau dieu snippets", "van dung deu 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 du deu 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 du deu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van du deu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van du deu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.