Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi khoa tre snippets" » "thai khoa tre snippets", "thit khoa tre snippets", "tai khoa tre snippets", "thi khoe tre snippets", "thi khoa tri snippets", "thi khoa dr 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: (((("thi khoa tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi khoa tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi khoa tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi khoa tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.