Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"fai va toan snippets" » "fai van toan snippets", "fai bai toan snippets", "fai tap toan snippets", "mai va toan snippets", "dai va toan snippets", "hai va toan 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: (((("fai va toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("fai va toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( fai va toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("fai va toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.