Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
hanh tranh » hanh trinh, hanh trang, lanh tranh
duong cong » dung cong, luong cong, duong trong
hoc thieu » toc thieu, hoc hien
cua duong » cua dong, cua huong, qua duong
dan toan » van toan, dan than, manh toan

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 khang - ((hanh tranh) OR (canh tranh)) cua duong cong ((dan toan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu khang - ((hanh tranh) OR (canh tranh)) cua duong cong ((dan toan) OR (tinh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu khang - ((hanh tranh) OR (canh tranh)) cua duong cong ((dan toan) or (tinh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - ((hanh tranh) OR (canh tranh)) cua duong cong ((dan toan) or (tinh toan)) cau*.