Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam voi can snippets" » "da voi can snippets", "dao voi can snippets", "dam cuoi can snippets", "dam voi cac snippets", "dam voi cong snippets", "dam voi hang 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 voi can 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 voi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam voi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam voi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.