Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
thieu cac » hieu cac, thien cac, hieu ca
thien cau » hien cau, khien cau, thien cac
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh 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 cac) or (thien cau))) or (chieu sach)) - canh tranh cua thong cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu cac) OR (thien cau))) OR (chieu sach)) - canh tranh cua thong cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu cac) or (thien cau))) or (chieu sach)) - canh tranh cua thong cong dan chan cau*.