Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len ban cong snippets" » "len bang cong snippets", "len van cong snippets", "len phan cong snippets", "xen ban cong snippets", "dien ban cong snippets", "lieu ban 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: (((("len ban 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: (((("len ban cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len ban cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len ban cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.