Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat vien tue snippets" » "thuat vien tue snippets", "nhan vien tue snippets", "phat hien tue snippets", "hat dien tu snippets", "hat tien te snippets", "hat hien 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: (((("hat vien tue snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat vien tue snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat vien tue snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat vien tue snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.