Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu lieu so snippets" » "du lieu so snippets", "tu lieu so snippets", "cu lieu so snippets", "khu hieu so snippets", "khu thieu so snippets", "khu lieu hoc 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: (((("khu lieu 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: (((("khu lieu so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu lieu so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu lieu so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.