Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh hai le snippets" » "dang hai le snippets", "lanh hai le snippets", "manh hai le snippets", "danh hai ly snippets", "danh tai le snippets", "danh hoi le 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: (((("danh hai le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh hai le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh hai le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh hai le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.