Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len choi hoc snippets" » "len thoi hoc snippets", "len troi hoc snippets", "ben chi hoc snippets", "len cho hoc snippets", "len hoi hoc snippets", "len phoi hoc 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 choi hoc 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 choi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len choi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len choi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.