Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
nhung cong » thong cong, hang cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
ban nhanh » ban hanh, ban thanh, ban nhan
nhanh cay » nhanh ha, nhanh bac, nhanh va
hoc hieu » hoc thieu, hoc hien, doc hieu

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 - doanh doanh nhan ((nhung cong) OR (dung cong)) ban nhanh cay~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - doanh doanh nhan ((nhung cong) OR (dung cong)) ban nhanh cay".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - doanh doanh nhan ((nhung cong) OR (dung cong)) ban nhanh cay*.