Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu te cong snippets" » "hieu ve cong snippets", "hien te cong snippets", "hieu he cong snippets", "hieu tai cong snippets", "hieu thi cong snippets", "hieu thu 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: (((("hieu te 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: (((("hieu te cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu te cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu te cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.