Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"voi hang den snippets" » "doi khang den snippets", "thi hang den snippets", "van hang den snippets", "voi hang dien snippets", "voi hang ben snippets", "voi huong 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: (((("voi hang 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: (((("voi hang den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( voi hang den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("voi hang den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.