Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thong cau so snippets" » "thong cac so snippets", "thong cap so snippets", "thong tu so snippets", "thong cau do snippets", "thong cau o snippets", "thong cao so 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: (((("thong cau so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong cau so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong cau so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong cau so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.