Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam huu chan snippets" » "dam huu han snippets", "dam huu chau snippets", "dam huu phan snippets", "dao huu chan snippets", "dai huu chan snippets", "pham huu chan 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 huu chan 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 huu chan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam huu chan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam huu chan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.