Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len mon hoc snippets" » "len men hoc snippets", "len con hoc snippets", "nen mong hoc snippets", "len toan hoc snippets", "len dong 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 mon 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 mon hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len mon hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len mon hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.