Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tac » trung tam, trong tac, trung tai
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
chi xanh » chi anh, chi danh, chi hanh
tac dung » sach dung, xay dung, tin dung
vang tan » van tan, tang tan, vang tao
doi chi » doi khi
tan tai » toan tai, tang tai, tuan tai

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 - thanh trung tac dung cong vang tan tai~.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh trung tac dung cong vang tan tai*.