Perhaps you should try some spelling variations:
chua xang » chua nang, chuc nang, chu bang
dung cong » dung trong
chu manh » ho manh, chu han, chu van
mang qua » mang cua, nang quan, tang quan
mang vua » mang cua, mang va, hang va
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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 manh) OR (chua xang)) - hanh ((mang qua) OR (mang vua)) dung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu manh) or (chua xang)) - hanh ((mang qua) OR (mang vua)) dung cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu manh) or (chua xang)) - hanh ((mang qua) OR (mang vua)) dung cong tan toan cau*.