Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ren thoi den snippets" » "tren thi den snippets", "ve thoi den snippets", "yen thai den snippets", "ren thai den snippets", "ren hoi den snippets", "ren thoi quen 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: (((("ren thoi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ren thoi den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ren thoi den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ren thoi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.