Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lieu van cho snippets" » "lieu va cho snippets", "hieu van cho snippets", "sieu van cho snippets", "lieu van chi snippets", "lieu san cho snippets", "lieu van chat 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: (((("lieu van cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lieu van cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lieu van cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lieu van cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.