Perhaps you should try some spelling variations:
tmanh trung » thanh trung, thanh tung, manh tung
manh trung » manh tung, thanh trung, manh hung
luong cong » dung cong, trong cong, cong cong
dai luong » dai cuong, dai duong, do luong
chi xanh » chi anh, chi danh, chi hanh
cong tac » cong ty
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 - ((manh trung) OR (tmanh trung)) dai luong cong tac ((toan tai) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((manh trung) or (tmanh trung)) dai luong cong tac ((toan tai) or (toan cao))*.