Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
nhung cong » dung cong, thong cong, hang cong
dang thanh » dong thanh, hoang thanh, quang thanh
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dang hanh » ban hanh, dang van, dang hung

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 hach - canh tranh cua nhung cong ((dang thanh) OR (dang hanh)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - canh tranh cua nhung cong ((dang thanh) OR (dang hanh)) cau*.