Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong tich so snippets" » "dong tinh so snippets", "dong trinh so snippets", "duong tinh so snippets", "dong tich bao snippets", "dong tinh son 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: (((("dong tich 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: (((("dong tich so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tich so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tich so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.