Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong ton du snippets" » "dong von du snippets", "dong son du snippets", "dong tin du snippets", "dong toan du snippets", "dong ton duc 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: (((("dong ton du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong ton du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong ton du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong ton du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.