Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc thau con snippets" » "doc than con snippets", "duoc thao con snippets", "doc thanh con snippets", "doc phau con snippets", "doc thai cong snippets", "doc khau cong 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: (((("doc thau con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc thau con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc thau con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc thau con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.