Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc tu cong snippets" » "doc thu cong snippets", "doc te cong snippets", "doc tai cong snippets", "duoc tu cong snippets", "hoc tu cong snippets", "duc tu cong 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: (((("doc tu cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc tu cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc tu cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc tu cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.