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