Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trung » thanh trung, hanh trang, manh trung
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
chi xanh » chi anh, chi danh, chi hanh
cong tan » cong tac, cong san, cong thanh
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap
doi chi » doi khi

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: doi chi xanh - hanh trung cua nhung cong tan ((toan tai) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh trung cua nhung cong tan ((toan tai) or (toan cao))*.