Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
manh toan » thanh toan, anh tuan, tinh 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) OR (hien hanh)) - hanh tinh quang ((nhung cong) or (thong cong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh tinh quang ((nhung cong) OR (thong cong)) manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - hanh tinh quang ((nhung cong) or (thong cong)) manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - hanh tinh quang ((nhung cong) or (thong cong)) manh toan ban*.