Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nham hat cu snippets" » "nham phat cu snippets", "nham mat cu snippets", "pham nhat cu snippets", "nham hat cua snippets", "nham bat cu snippets", "nham hat ca 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: (((("nham hat cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nham hat cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nham hat cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nham hat cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.