Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len uon doi snippets" » "len con doi snippets", "len duong doi snippets", "lan buon doi snippets", "len huong doi snippets", "len tuong doi 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: (((("len uon doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("len uon doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len uon doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len uon doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.