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