Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len xu cong snippets" » "len tu cong snippets", "len vu cong snippets", "len xu dong snippets", "lenh xu cong snippets", "wen xu 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 xu 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 xu cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len xu cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len xu cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.