Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chieu dan de snippets" » "chieu day de snippets", "chieu sang de snippets", "chieu xanh de snippets", "chieu dan den snippets", "chieu dang de snippets", "chieu van 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: (((("chieu dan 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: (((("chieu dan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chieu dan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chieu dan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.