Perhaps you should try some spelling variations:
tinh tran » tinh trang, tinh toan, tinh than
kiem soat » kiem toan
dinh dung » dinh duong, dinh hung, tinh dung
quang le » quang yen, quan ly, quan li
dung qua » duong qua, dung quan, dung cua
van giam » van giao, van giang, dan gian
le kiem » de kiem, le kim, ke kiem
qua van » quan van, qua ban, qua san

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh tran quang le kiem soat ) or ( dinh dung qua van giam sat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh tran quang le kiem soat ) OR ( dinh dung qua van giam sat ))*.