Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hien xanh » hien hanh, hien nhanh, chieu xanh
hang cong » dang cong, hang nong, bang cong
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - anh ((tang cua) or (mang cua)) ((nhung cong) OR (hang cong)) tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - anh ((tang cua) OR (mang cua)) ((nhung cong) OR (hang cong)) tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - anh ((tang cua) or (mang cua)) ((nhung cong) OR (hang cong)) tac toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - anh ((tang cua) or (mang cua)) ((nhung cong) OR (hang cong)) tac toan ban*.