Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua duc don snippets" » "cua tuc don snippets", "cua nuoc don snippets", "cua quoc don snippets", "cua duc dong snippets", "cua duc ton snippets", "cua duc con 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: (((("cua duc don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cua duc don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua duc don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua duc don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.