Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam da hoc snippets" » "dam dac hoc snippets", "dam dam hoc snippets", "nam da hoc snippets", "dam dai hoc snippets", "dam dan hoc snippets", "dam day hoc 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: (((("dam da hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dam da hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam da hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam da hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.