Perhaps you should try some spelling variations:
parent training » talent training, market training, strength training
training cost » training costs, training course, training courses
dong hoang » hong hong
hua parent » a parent
cost congo » cost control
congo shu » cong shu
sin » sign, sind, skin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong hoang) or (dong sin)) ya hua parent training cost congo shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (dong sin)) ya hua parent training cost congo shu ;*.