Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan tac den snippets" » "nhan tai den snippets", "nhan tao den snippets", "nhan tam den snippets", "nhan tac de snippets", "nhan tat den snippets", "nhan thai den 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: (((("nhan tac 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: (((("nhan tac den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan tac den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan tac den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.