Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan che son snippets" » "han che son snippets", "phap che son snippets", "phan thi son snippets", "phan che mon snippets", "phan cho son snippets", "phan chet song 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: (((("phan che son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan che son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan che son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan che son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.