Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc hoat doi snippets" » "doi hoat doi snippets", "ngoc hoat doi snippets", "hoc hoa doi snippets", "doc hoa doi snippets", "doc hat doi snippets", "doc hoat dong 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: (((("doc hoat doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc hoat doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc hoat doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc hoat doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.