Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van san cac snippets" » "van sang cac snippets", "van ban cac snippets", "van son cac snippets", "van sat cac snippets", "van sao cac snippets", "van dan cac 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 san cac 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 san cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van san cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van san cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.