Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu do tong snippets" » "thu dao tong snippets", "thu do trong snippets", "thu do hong snippets", "thuy do tong snippets", "khu do tong snippets", "tu do tong 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: (((("thu do tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu do tong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu do tong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu do tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.