Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"que tac can snippets" » "quy tac can snippets", "que tai can snippets", "que tran can snippets", "que tac van snippets", "que tac quan snippets", "que tac vang 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: (((("que tac can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("que tac can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( que tac can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("que tac can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.