Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
quan quang » qua quang, quan quan, quat quang
tinh quan » tinh quang, trinh quan, tin quan
quang toc » quang hoc, quang goc, quang ngoc
van thanh » ban thanh, van tuan
phan kiem » phan kien, phan mem, van kiem
kiem soat » kiem toan
toc hieu » toc thieu, doc hieu, hoc thieu

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

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