Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"truc ngu cua snippets" » "tuc ngu cua snippets", "truc du cua snippets", "tu ngu cua snippets", "truc ngu ca snippets", "truc ngu cu 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: (((("truc ngu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("truc ngu cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truc ngu cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truc ngu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.