Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van vat cach snippets" » "van va cach snippets", "van sat cac snippets", "van mot cach snippets", "van chat cach snippets", "nhan vat cach 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 vat cach 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 vat cach snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van vat cach snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van vat cach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.