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