Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van khuc ke snippets" » "van phuc ke snippets", "van thuc ke snippets", "van phuoc ke snippets", "van chuc ke snippets", "van khuc kim 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: (((("van khuc ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van khuc ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van khuc ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van khuc ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.