Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham nhat so snippets" » "pham nhat so snippets", "tham nhap so snippets", "tham khao so snippets", "tham thuat so 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: (((("tham nhat 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: (((("tham nhat so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham nhat so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham nhat so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.