Perhaps you should try some spelling variations:
cook change » looks change, work change, cover change
yang cook » ian cook, yang chik
wing tan » wing ian, liang tan, hong tan
tan yang » dan yang, tan ying, tan yong
when hui » when i, when he, chun hui
when how » when do
hong ghi » zhong zhi, hong g, hong hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: wing tan yang cook change ((when hui) OR (when how)) ((hong ghi) or (hong (tan or than))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing tan yang cook change ((when hui) OR (when how)) ((hong ghi) OR (hong (tan OR than))) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wing tan yang cook change ((when hui) OR (when how)) ((hong ghi) or (hong (tan or than))) ;*".