Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi lieu cao snippets" » "tai lieu cao snippets", "thi lien cao snippets", "thi dieu cao snippets", "thi lieu dao snippets", "thi lieu co snippets", "thi lieu bao 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 lieu cao 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 lieu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi lieu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi lieu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.