Perhaps you should try some spelling variations:
jeang yean » jeong yeon
seung yeon » jeong yeon, seung joon, seung won
hong jong » hong kong
how main » how email, how many, how aid
yang du » yang di, yang mu, yang jui
how men » how women, how many
yang d » yang di, yang _, yang 8

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hong jong ((yang du) OR (yang d)) debt ((how main) OR (how men)) ((jeang yean) OR (seung yeon)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hong jong ((yang du) or (yang d)) debt ((how main) OR (how men)) ((jeang yean) or (seung yeon)) ;~".
• Adding a wildcard symbol may retrieve word variants: hong jong ((yang du) or (yang d)) debt ((how main) OR (how men)) ((jeang yean) or (seung yeon)) ;*.