Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
gene tang » gene bank
tang min » chang min, sang minh, yang mind
min dang » yimin dang, mein dank, bin dann
a gene » a genre, a gender, a gentle
ya a » a a, y a, ye a
hai » hadi, haji, hari

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong yang) OR (yang yang)) ya a gene tang min dang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) OR (yang yang)) ya a gene tang min dang hai ;".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) OR (yang yang)) ya a gene tang min dang hai ;*.