Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhap con so snippets" » "nhap cong so snippets", "nhap mon so snippets", "nhan con so snippets", "nhap hon so snippets", "nhap con bo 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: (((("nhap con so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhap con so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhap con so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhap con so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.