Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc manh que snippets" » "suc manh que snippets", "duc anh que snippets", "duc minh que snippets", "duc manh quan snippets", "duc manh cua snippets", "duc manh tu 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 manh que 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 manh que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc manh que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc manh que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.