Perhaps you should try some spelling variations:
quang quang » quan quang, dang quang, dung quang
quang hoc » quang hoi, quang huy, dung hoc
kiem soat » kiem toan
nang quan » ban quan, nang suat
luan hieu » luan tieu, luan dieu, luan thiet
hoc kiem » hoi kiem, hoa kiem, thuoc kiem
tin nang » tin dung, ki nang, thi nang
hieu va » lieu va, hieu qua
tinh » trinh, dinh, minh

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

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