Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luu thanh so snippets" » "luu hanh so snippets", "cuu thanh so snippets", "luan thanh so snippets", "luu thanh son snippets", "luu thanh do snippets", "luu 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: (((("luu thanh 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: (((("luu thanh so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luu thanh so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luu thanh so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.