Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong hoi le snippets" » "cong nhoi le snippets", "cong hoa le snippets", "cong hai le snippets", "cong hoi ve snippets", "cong hoi e 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: (((("cong hoi 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: (((("cong hoi le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong hoi le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong hoi le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.