Perhaps you should try some spelling variations:
trung thanh » truong thanh
thue xanh » thue thanh, thuc hanh, thuy anh
tran tuan » tran xuan, tran quang, tran thanh
bang cong » dang cong, bang song, hang cong
cong doan » cong dan, cong hoan, dong doanh
cho thue » choi thuc, cuc thue, cho he
doan van » doan va, hoang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho thue xanh - hanh ((trung thanh) or (tran tuan)) bang cong doan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho thue xanh - hanh ((trung thanh) OR (tran tuan)) bang cong doan van ban.
• Adding a wildcard symbol may retrieve word variants: cho thue xanh - hanh ((trung thanh) or (tran tuan)) bang cong doan van ban*.