Perhaps you should try some spelling variations:
"doi hoc chat snippets" » "doi hoc code snippets", "doi hoc phat snippets", "doi hoc cao snippets", "doi hoc phan snippets", "doi hoac chat snippets", "dai hoc chat snippets", "hoi hoc chat snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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: (((("python using java snippets") or ("doi hoc chat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("doi hoc chat snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( doi hoc chat snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("doi hoc chat snippets"))) or ("locating bug core snippets"))*.