Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc thinh o2 snippets" » "duc thanh o2 snippets", "quoc thinh o2 snippets", "duc minh o2 snippets", "duc thinh le snippets", "duc hinh o snippets", "duc thinh ha 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 thinh o2 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 thinh o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc thinh o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc thinh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.