Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"diep tich he snippets" » "diep tinh he snippets", "dien tich he snippets", "di tich he snippets", "diep tich ho snippets", "diep trinh he snippets", "diep tich hop 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: (((("diep tich he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("diep tich he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( diep tich he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("diep tich he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.