Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hang dau da snippets" » "hang va da snippets", "hang tai da snippets", "hang dau va snippets", "hang dan da snippets", "hang dau ha 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: (((("hang dau da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang dau da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang dau da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang dau da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.