Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thpt con de snippets" » "thpt hon de snippets", "thpt dong de snippets", "thpt hong de snippets", "thpt cong de snippets", "thpt con se 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: (((("thpt con de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thpt con de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thpt con de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thpt con de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.