Perhaps you should try some spelling variations:
trung thanh » truong thanh
tran thanh » ban thanh, van thanh, quan thanh
chua xang » chua nang, chuc nang, chu bang
bang cong » dang cong, bang song, hang cong
cong hoan » cong hoa, dong hoa, cong san
chu xanh » chu manh, chieu xanh, chuc danh
hoan van » hoang van, hoa van, doan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu xanh) OR (chua xang)) - hanh ((trung thanh) or (tran thanh)) bang cong hoan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chua xang)) - hanh ((trung thanh) OR (tran thanh)) bang cong hoan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) OR (chua xang)) - hanh ((trung thanh) or (tran thanh)) bang cong hoan van ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) OR (chua xang)) - hanh ((trung thanh) or (tran thanh)) bang cong hoan van ban*.