Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mat tinh hoc snippets" » "may tinh hoc snippets", "man tinh hoc snippets", "sat tinh hoc snippets", "mat sinh hoc snippets", "mat tin hoc snippets", "mat hinh 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: (((("mat tinh 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: (((("mat tinh hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mat tinh hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mat tinh hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.