Perhaps you should try some spelling variations:
truong cong » trong cong, truong long, truong chung
truong dong » trong dong, truong dang, tuong dong
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong cap » cung cap, cong cau, cong cac
ban toan » bai toan, ban than, van 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 ((thieu xanh) or (hieu manh)) - thanh cong cap ((truong cong) OR (truong dong)) ban toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh cong cap ((truong cong) OR (truong dong)) ban toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - thanh cong cap ((truong cong) OR (truong dong)) ban toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - thanh cong cap ((truong cong) OR (truong dong)) ban toan ban*.