Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"trinh van oc snippets" » "trinh van code snippets", "trinh han oc snippets", "trinh quan oc snippets", "trinh toan oc snippets", "trinh van hoc snippets", "trinh van loc snippets", "trinh van ngoc 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: (((("trinh van oc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh van oc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trinh van oc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh van oc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.