Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thai van hoe snippets" » "thi van hoe snippets", "thanh van hoe snippets", "thai vung hoe snippets", "thai van hoa snippets", "thai van hoc snippets", "thai van hieu 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: (((("thai van hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thai van hoe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thai van hoe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thai van hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.