Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hat doi snippets" » "duc phat doi snippets", "duc hau doi snippets", "duc ha doi snippets", "duc hoat doi snippets", "duc thay doi snippets", "duc hang doi 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 hat doi 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 hat doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hat doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hat doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.