Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van chinh ve snippets" » "va chinh ve snippets", "van thinh ve snippets", "hanh chinh ve snippets", "van chinh va snippets", "van chinh vi snippets", "van chinh ke 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 chinh ve 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 chinh ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van chinh ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van chinh ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.