Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"vien cac cau snippets" » "vien cac code snippets", "vien bach cau snippets", "vien dai cau snippets", "vien da cau snippets", "vien cac mau snippets", "vien bac cau snippets", "vien ca cau snippets"
"python using java snippets" » "python using data 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: (((("vien cac cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vien cac cau snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( vien cac cau snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vien cac cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.