Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc tu cuong snippets" » "doc thu cuong snippets", "doc tu tuong snippets", "doc tu cong snippets", "duoc tu cuong snippets", "hoc tu cuong snippets", "duc tu cuong 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: (((("doc tu cuong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc tu cuong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc tu cuong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc tu cuong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.