Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van duoc do snippets" » "van duoc code snippets", "van duc do snippets", "vat duoc do snippets", "tan duoc do snippets", "van duoc dao snippets", "van duoc co snippets", "van duoc vo 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: (((("van duoc do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van duoc do snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van duoc do snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van duoc do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.