Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc quoc cao snippets" » "duoc quoc cao snippets", "hoc quoc cao snippets", "doc cuoc cao snippets", "doc quoc bao snippets", "doc quoc cac snippets", "doc quoc cho 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 quoc cao 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 quoc cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc quoc cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc quoc cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.