Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van hai doc snippets" » "van hai code snippets", "van ha doc snippets", "van chat doc snippets", "van hanh doc snippets", "van bai doc snippets", "van hai huoc snippets", "van than doc 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 hai doc 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 hai doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van hai doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hai doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.