Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac li cong snippets" » "cac bi cong snippets", "cac li song snippets", "cac lieu cong snippets", "cac vi cong snippets", "cac di cong snippets", "cac le 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: (((("cac li 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: (((("cac li cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac li cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac li cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.