Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban can cong snippets" » "ban cac cong snippets", "ban cao cong snippets", "ban van cong snippets", "ban dan cong snippets", "ban hang cong snippets", "ban hanh 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: (((("ban can 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: (((("ban can cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban can cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban can cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.