Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoe cua du snippets" » "kho cua du snippets", "khoa cua du snippets", "khoi cua du snippets", "khoe cua duc snippets", "khoe cua ndu snippets", "khoe cua su 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: (((("khoe cua du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoe cua du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoe cua du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoe cua du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.