Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
chi xanh » chi anh, chi danh, chi hanh
anh quan » anh tuan, ban quan, anh nhan
quan cua » quan luan, ban cua, gian cua
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - anh quan cua ((nhung cong) OR (dung cong)) ((tan toan) or (tap toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - anh quan cua ((nhung cong) OR (dung cong)) ((tan toan) OR (tap toan)) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - anh quan cua ((nhung cong) OR (dung cong)) ((tan toan) or (tap toan)) cao*".