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