Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len le cau snippets" » "len se cau snippets", "yen le cau snippets", "luyen le cau snippets", "len ke cau snippets", "len le mau snippets", "len le cap 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 le cau 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 le cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len le cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len le cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.