Perhaps you should try some spelling variations:
chua xang » chua nang, chuc nang, chu bang
nang cong » nang song, dang cong, bang cong
chu xanh » chu manh, chieu xanh, chuc danh
tang van » dang van, hoang van, trong van
cong tan » cong tac, cong san, cong thanh
tran cao » toan cao, tran chau, trang cho
tang va » trang va, thang va, tang vat

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: theo ((chu xanh) OR (chua xang)) - hanh ((tang va) OR (tang van)) nang cong tan tran cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chua xang)) - hanh ((tang va) OR (tang van)) nang cong tan tran cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chua xang)) - hanh ((tang va) OR (tang van)) nang cong tan tran cao*.