Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van khang do snippets" » "van khang code snippets", "van khanh do snippets", "van thanh do snippets", "van quang do snippets", "van khong do snippets", "van khang voi snippets", "van khang kho 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 khang 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 khang do snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van khang do snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van khang do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.