Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van luc cao snippets" » "van luc code snippets", "van loc cao snippets", "van duc cao snippets", "van lu cao snippets", "van luc cho snippets", "van luc canh snippets", "van quoc cao 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 luc cao 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 luc cao snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van luc cao snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van luc cao snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.