Perhaps you should try some spelling variations:
tinh tinh » trinh tinh, tinh ninh, tinh binh
quang dan » quang dang, quang doan, quang ban
kiem soat » kiem toan
dung nung » dung nhung, dung ung, dung dung
nung phan » nhung phan, dung phan, nang phan
phan hieu » van hieu, phan kien, gian hieu
hieu luat » hieu qua
dan kiem » van kiem, toan kiem, phan kiem

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 dan kiem soat ) or ( tin dung nung phan hieu luat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh tinh quang dan kiem soat ) OR ( tin dung nung phan hieu luat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh tinh quang dan kiem soat ) or ( tin dung nung phan hieu luat ))*.