Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tien da snippets" » "duc thien da snippets", "luc tieng da snippets", "thuc tien da snippets", "duc tien dam snippets", "duc tien dat snippets", "duc tien dua 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: (((("duc tien da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc tien da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tien da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tien da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.