Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo diep » theo tieu
ban quan » van quan
dung cua » dung luan, dung cho
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo diep tinh - hanh ((((ban cua) OR (ban quan))) OR (dung cua)) nhung cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo diep tinh - hanh ((((ban cua) OR (ban quan))) or (dung cua)) nhung cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo diep tinh - hanh ((((ban cua) OR (ban quan))) or (dung cua)) nhung cong dan toan cau*.