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