Perhaps you should try some spelling variations:
thieu hach » hieu cach, thieu cac
thien hach » thien thanh, hien hanh
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
ca cau » cua cau, cac cau, can cau

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