Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi cau de snippets" » "khi hau de snippets", "khi cu de snippets", "khien cau de snippets", "khi cau den snippets", "khi cau do snippets", "khi cuu de 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: (((("khi cau de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi cau de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi cau de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi cau de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.