Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc van choi snippets" » "duc van chi snippets", "duc van cho snippets", "duc san choi snippets", "duc va choi snippets", "duc tan choi snippets", "duc manh choi 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 van choi 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 van choi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc van choi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc van choi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.