Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tot nhat co snippets" » "tot nha co snippets", "tiet nhat co snippets", "moi nhat co snippets", "tot nhat cho snippets", "tot nhat so snippets", "tot chat co 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: (((("tot nhat co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tot nhat co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tot nhat co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tot nhat co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.