Perhaps you should try some spelling variations:
dung chung » dung cong, dung ung, dung trung
chung phan » chung nhan, chung han, chung than
tinh tinh » trinh tinh, tinh ninh, tinh binh
quang van » quang ban, quan van, quang uan
kiem soat » kiem toan
phan hieu » van hieu, phan kien, gian hieu
hieu luat » hieu qua
van kiem » va kiem, van kien, van hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh tinh quang van kiem soat ) or ( tin dung chung phan hieu luat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh tinh quang van kiem soat ) OR ( tin dung chung phan hieu luat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh tinh quang van kiem soat ) or ( tin dung chung phan hieu luat ))*.