Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc mot cong snippets" » "doc moi cong snippets", "doc hoc cong snippets", "doc bo cong snippets", "hoc mot cong snippets", "dich mot cong snippets", "duoc moi 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: (((("doc mot 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: (((("doc mot cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc mot cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc mot cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.