Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sinh vien so snippets" » "sinh bien so snippets", "sinh viec so snippets", "sinh vien co snippets", "dinh vien so snippets", "minh vien so snippets", "kinh vien so 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: (((("sinh vien so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sinh vien so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sinh vien so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sinh vien so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.