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