Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mong dan den snippets" » "cong dan den snippets", "nong dan den snippets", "dong dan den snippets", "mong ban den snippets", "mong van den snippets", "mong dan dung 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: (((("mong dan 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: (((("mong dan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mong dan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mong dan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.