Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chu manh » chu han, thu minh
tranh va » tranh van, trang va, trinh va
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap
chu van » cuu van, chu han

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: chao ((((chu manh) OR (chu van))) OR (ho manh)) - canh tranh va nhung cong tac than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao ((((chu manh) OR (chu van))) or (ho manh)) - canh tranh va nhung cong tac than cau~".
• Adding a wildcard symbol may retrieve word variants: chao ((((chu manh) OR (chu van))) or (ho manh)) - canh tranh va nhung cong tac than cau*.