Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van dung te snippets" » "van dong te snippets", "xay dung te snippets", "tin dung te snippets", "van dung he snippets", "van dung de snippets", "van dung le 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 dung te 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 dung te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van dung te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van dung te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.