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