Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tre trinh do snippets" » "tra trinh do snippets", "tre tinh do snippets", "tien trinh do snippets", "tre trinh ky 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: (((("tre trinh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tre trinh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tre trinh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tre trinh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.