Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khat qua cac snippets" » "nhat qua cac snippets", "khat sua cac snippets", "khai quat cac snippets", "khat cua cac 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: (((("khat qua cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khat qua cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khat qua cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khat qua cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.