Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi kiem co snippets" » "thi kim co snippets", "thi lien co snippets", "thi hien co snippets", "thi kien co snippets", "thi hiem cho snippets", "thi kiem mon 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 kiem co 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 kiem co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi kiem co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi kiem co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.