Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh du so snippets" » "danh dau so snippets", "danh tu so snippets", "dinh du so snippets", "danh duc so snippets", "danh duy 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: (((("danh du 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: (((("danh du so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh du so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh du so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.