Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dang » cong dong, cong dung, cong danh
thanh cau » thanh chau, thanh mau, nhanh cau
cong dan » cong san, cong tan, huong dan

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