Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong thap so snippets" » "dong tham so snippets", "dong thanh so snippets", "dong thuan so snippets", "dong phap so snippets", "dong tap so snippets", "dong than 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: (((("dong thap 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 thap so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong thap so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong thap so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.