Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van jhi yong snippets" » "van thi cong snippets", "van thi hong snippets", "van ji young snippets", "van chi yong snippets", "van nhi yong snippets", "van khi yong 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 jhi yong 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 jhi yong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van jhi yong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van jhi yong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.