Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hang dau den snippets" » "hang va den snippets", "hang tai den snippets", "hang dau dien snippets", "hang dan den snippets", "hang cau 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: (((("hang dau 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: (((("hang dau den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang dau den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang dau den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.