Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong cao hoc snippets" » "duong cao hoc snippets", "dong co hoc snippets", "dong cho hoc snippets", "dong chat 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: (((("dong cao 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: (((("dong cao hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cao hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cao hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.