Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan giang vo snippets" » "dan gian vo snippets", "van giang vo snippets", "manh giang vo snippets", "dan giang o snippets", "dan giang ve snippets", "dan giang van 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: (((("dan giang vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan giang vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan giang vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan giang vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.