Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hoc thiet » hoc thieu, hoc thuyet, toc thieu
lanh manh » lanh tranh, lan anh, van manh
hang cong » dang cong, hang nong, bang cong
manh cua » doanh cua, ban cua
van chat » cao chat
chat bao » chat ban, thuat bao, nhat 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 thiet) or (hoc hien)) tach - lanh manh cua ((nhung cong) OR (hang cong)) van chat bao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc hien)) tach - lanh manh cua ((nhung cong) OR (hang cong)) van chat bao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc hien)) tach - lanh manh cua ((nhung cong) OR (hang cong)) van chat bao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc hien)) tach - lanh manh cua ((nhung cong) OR (hang cong)) van chat bao*.