Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
tinh dung » trinh dung, tin dung, tinh huong
kiem soat » kiem toan
quan dang » quang dang, quan lang, quan dong
canh van » anh van, can van, cach van
dieu hat » dieu hanh, dieu khac, dieu can
lanh va » hanh va, anh va, lanh dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh dung ((lanh va) or (canh van)) kiem soat ) or ( tinh quang quan dang dieu hat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung ((lanh va) OR (canh van)) kiem soat ) OR ( tinh quang quan dang dieu hat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung ((lanh va) or (canh van)) kiem soat ) or ( tinh quang quan dang dieu hat ))*.