Perhaps you should try some spelling variations:
rent training » parent training, best training, test training
training cost » training costs, training course, training courses
yang yang » wang yang, wang yan
dong sink » dong bin, dong ping
hua rent » hua ren
sink » signk, sindk, skink
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: ((yang yang) or (((dong sink) OR (dong sin)))) ya hua rent training cost (cong or long) shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (((dong sink) OR (dong sin)))) ya hua rent training cost (cong OR long) shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (((dong sink) OR (dong sin)))) ya hua rent training cost (cong or long) shu ;*".