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