Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran hanh le snippets" » "tran thanh le snippets", "tran manh le snippets", "tran anh le snippets", "tran hanh ve snippets", "tran hanh 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: (((("tran hanh le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran hanh le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran hanh le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran hanh le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.