Perhaps you should try some spelling variations:
phuong kiem » phuong tien, phong kien, thong kiem
kiem soat » kiem toan
binh dan » minh danh, binh dinh, binh luan
dan bang » dang bang, can bang, dau bang
luan dac » luan danh, luan van, luan va
dac hieu » doc hieu, dao hieu, dat hieu
hieu so » thieu so

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( binh dan bang phuong kiem soat ) or ( tin dung luan dac hieu so ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( binh dan bang phuong kiem soat ) OR ( tin dung luan dac hieu so )).
• Adding a wildcard symbol may retrieve word variants: (( binh dan bang phuong kiem soat ) or ( tin dung luan dac hieu so ))*.