Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tuc van long snippets" » "tuc van luong snippets", "tuc van dong snippets", "tuc van cong snippets", "thuc van long snippets", "truc van long snippets", "tuc va long 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: (((("tuc van long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tuc van long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tuc van long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tuc van long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.