Perhaps you should try some spelling variations:
luong than » luong thanh, truong thanh
long thanh » luong thanh, long han, long trinh
one mail » one mailer, e mail, one man
yan can » yan clan, yan guan, yan wang
man can » man han, woman can, man kann
a gene » a genre, a gender, a gentle
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((((yan can) or (man can))) or (yan cong)) a gene ((luong than) OR (long thanh)) one mail ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((((yan can) OR (man can))) OR (yan cong)) a gene ((luong than) OR (long thanh)) one mail ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((yan can) or (man can))) or (yan cong)) a gene ((luong than) OR (long thanh)) one mail ;".
• Adding a wildcard symbol may retrieve word variants: wang ((((yan can) or (man can))) or (yan cong)) a gene ((luong than) OR (long thanh)) one mail ;*.