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