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