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