Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc le con snippets" » "ngoc de con snippets", "ngoc ly con snippets", "ngoc lien con snippets", "ngoc le cong snippets", "ngoc len con snippets", "ngoc le co 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: (((("ngoc le con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngoc le con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc le con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc le con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.