Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat mo hoc snippets" » "nhat moi hoc snippets", "nhat so hoc snippets", "nhan mo hoc snippets", "nhat mon hoc snippets", "nhat co 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: (((("nhat mo 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: (((("nhat mo hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat mo hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat mo hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.