Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi quoc do snippets" » "thu quoc do snippets", "tai quoc do snippets", "thi nuoc do snippets", "thi duoc do snippets", "thi quoc co 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 quoc 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 quoc do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi quoc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi quoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.