Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong duoc ve snippets" » "dong duoc code snippets", "dong quoc ve snippets", "dong duong ve snippets", "trong duoc ve snippets", "dong duoc va snippets", "dong nuoc ve snippets", "dong 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: (((("dong duoc ve snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong duoc ve snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong duoc ve snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong duoc ve snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.