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