Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » manh cua
doanh cua » doanh luan
hoc hieu » hoc thieu, hoc hien, doc hieu
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - hanh ((tranh cua) OR (doanh cua)) nhung cong tan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - hanh ((tranh cua) OR (doanh cua)) nhung cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh ((tranh cua) OR (doanh cua)) nhung cong tan than cau*.