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