Perhaps you should try some spelling variations:
"enhancing international airport" » "enhancing interlaminar airport" (Expand Search), "enhancing interpersonal airport" (Expand Search), "changi international airport" (Expand Search), "enhancing international market" (Expand Search), "enhancing international affairs" (Expand Search)
"chairing international airport" » "caring international airport" (Expand Search), "changi international airport" (Expand Search), "during international airport" (Expand Search), "chairing international market" (Expand Search), "chairing international affairs" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"chairing international airport\") OR (\"enhancing international airport\"))~".
• Removing quotes may allow a broader search: (( chairing international airport ) OR ( enhancing international airport ))~.
• Adding a wildcard symbol may retrieve word variants: (("chairing international airport") OR ("enhancing international airport"))*.