Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi tong son snippets" » "doi tuong son snippets", "doi trong son snippets", "doi song son snippets", "doi dong son snippets", "doi hong son snippets", "doi tang son 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: (((("doi tong son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi tong son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi tong son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi tong son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.