Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tham cua snippets" » "duc pham cua snippets", "duc kham cua snippets", "duc tam cua snippets", "duc thai cua snippets", "duc than cua snippets", "duc thao cua 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: (((("duc tham 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: (((("duc tham cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tham cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tham cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.