Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chieu duong » dieu duong, chiu dong, chi duong
thanh trung » thanh tung
cap thuong » chap thuong, ca thuong, cp thuong
cao thuong » cao truong, ca thuong, cho thuong
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 khang) or (chieu duong)) - thanh trung ((cap thuong) OR (cao thuong)) cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (chieu duong)) - thanh trung ((cap thuong) OR (cao thuong)) cong dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) or (chieu duong)) - thanh trung ((cap thuong) OR (cao thuong)) cong dan chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) or (chieu duong)) - thanh trung ((cap thuong) OR (cao thuong)) cong dan chan cau*.