Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van nga cac snippets" » "van nga code snippets", "van nghe cac snippets", "van ngoc cac snippets", "van nhan cac snippets", "van ngu cac snippets", "van ngan bac snippets", "van ngan can 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 nga cac 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 nga cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van nga cac snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van nga cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.