Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc hieu hoc snippets" » "toc thieu hoc snippets", "hoc thieu hoc snippets", "hoc hien hoc snippets", "doc lieu hoc snippets", "doc hieu hoa snippets", "doc tieu 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: (((("doc hieu 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: (((("doc hieu hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc hieu hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc hieu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.