Perhaps you should try some spelling variations:
chua xang » chua nang, chuc nang, chu bang
hang cong » dang cong, hang nong, bang cong
thang va » hang va, trang va, thanh va
thong va » thong cua, truong va, thong qua
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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 ((thuc hanh) OR (chua xang)) - hanh ((thang va) OR (thong va)) hang cong tan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((thuc hanh) or (chua xang)) - hanh ((thang va) OR (thong va)) hang cong tan than cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((thuc hanh) or (chua xang)) - hanh ((thang va) OR (thong va)) hang cong tan than cau*.