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