Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao thi loan snippets" » "nao thi lan snippets", "nao thi hoan snippets", "nao thi lien snippets", "dao thi loan snippets", "ngo thi loan snippets", "cao thi loan 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: (((("nao thi loan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nao thi loan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao thi loan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao thi loan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.