Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tren thi den snippets" » "trien thi den snippets", "tran thi den snippets", "trieu thi den snippets", "tren thai den snippets", "tren thi dan snippets", "tren thi dep 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: (((("tren thi 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: (((("tren thi den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tren thi den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tren thi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.