Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi kien du snippets" » "doi dien du snippets", "doi bien du snippets", "doi hien du snippets", "doi kien de snippets", "doi vien du 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: (((("doi kien 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: (((("doi kien du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi kien du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi kien du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.