Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi vu cham snippets" » "khi va cham snippets", "khi vu kham snippets", "khi tu cham snippets", "thi vu cham snippets", "khi cu 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: (((("khi 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: (((("khi vu cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi vu cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi vu cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.