Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu nhat con snippets" » "thu nhap con snippets", "thu thuat con snippets", "thu ha con snippets", "thu nhan con snippets", "thu nhat co snippets", "thu nhap cong 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 nhat 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: (((("thu nhat con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu nhat con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu nhat con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.