Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tho van cao snippets" » "thao van cao snippets", "ho van cao snippets", "tho dan cao snippets", "tho van dao snippets", "tho van bao snippets", "tho van cau 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: (((("tho van 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: (((("tho van cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tho van cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tho van cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.