Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hoi canh snippets" » "thu boi canh snippets", "thu doi canh snippets", "thu hoi danh snippets", "thu hoai canh snippets", "thu phoi canh snippets", "thu hai canh 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: (((("thu hoi canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu hoi canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hoi canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hoi canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.