Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phong thi ve snippets" » "phuong thi ve snippets", "phung thi ve snippets", "phong tri ve snippets", "phong thi vu snippets", "phong thi le snippets", "phong thi va 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: (((("phong thi ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phong thi ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phong thi ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phong thi ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.