Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dai thi doan snippets" » "dai thai doan snippets", "dai thi hoan snippets", "dai thi loan snippets", "dan thi doan snippets", "dao thi doan snippets", "tai thi doan 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: (((("dai thi doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dai thi doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai thi doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai thi doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.