Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thue luat du snippets" » "thai luat du snippets", "thue quan du snippets", "thue luat dau snippets", "thue luat su snippets", "thue luat tu 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: (((("thue luat du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thue luat du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thue luat du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thue luat du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.