Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van hai time snippets" » "van a time snippets", "van tai tim snippets", "van dai tim snippets", "van ha time snippets", "van chat time snippets", "van hanh time 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: (((("van hai time snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van hai time snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hai time snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hai time snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.