Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cong cong » trong cong, dung cong, dang cong
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu khang - hanh tranh cua ((cong cong) OR (cong dong)) san toan ban~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - hanh tranh cua ((cong cong) OR (cong dong)) san toan ban*.