Perhaps you should try some spelling variations:
thieu hach » chieu sach, hieu cach, thieu cac
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan 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 ((thieu hach) OR (thien hach)) - canh tranh cua nhung cong dan toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu hach) OR (thien hach)) - canh tranh cua nhung cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu hach) OR (thien hach)) - canh tranh cua nhung cong dan toan tap*.