Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi hao nghe snippets" » "thi nao nghe snippets", "thi tao nghe snippets", "thi hanh nghe snippets", "thi thao nghe snippets", "thi hai nghe snippets", "thi ha nghe 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: (((("thi hao nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi hao nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi hao nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi hao nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.